| Patent Number |
Title Of Patent |
Date Issued |
| 7222967 |
Image display optical system and projection type image display apparatus |
May 29, 2007 |
| An image display optical system according to the present invention has an illumination optical system, a plurality of image display elements, a color separation/combination optical system, and a projection optical system. The image display optical system also has a light guide element |
| 7213924 |
Image projection apparatus and image projection system |
May 8, 2007 |
| The image projection apparatus includes a first, a second and a third reflective liquid crystal display element, an illumination optical system which color-separates light from a light source into first, second and third color light component and illuminating the three reflective liquid |
| 7196743 |
Image display apparatus having particular phase difference |
March 27, 2007 |
| An image display apparatus is disclosed which is capable of obtaining a projected image having high contrast. The image display apparatus includes a luminous flux dividing system dividing light from a light source into a plurality of luminous fluxes and a condensing optical system le |
| 7178548 |
Dry safety device for an inflammable gas |
February 20, 2007 |
| A dry safety device for an inflammable gas comprises a case main body having a gas passage which terminates at one end in a primary side open port connectable to a source of inflammable gas and terminates at the other end in a secondary side open port connectable to a gas-fired appli |
| 7156520 |
Color separating optical system, image display optical system, and projection image display appa |
January 2, 2007 |
| A color separating-combining optical system is configured to separate illumination light into a plurality of color spectrums, guiding these color spectrums to respective image display elements, and combining the color spectrums modulated by the image display elements. The system incl |
| 7137704 |
Color splitting/combining optical system and image projecting apparatus |
November 21, 2006 |
| A color splitting/combining optical system includes a first optical member for color splitting and a second optical member which has a polarization splitting surface for color splitting/combining, a third optical member for color combining a first color-selective wave plates and a second |
| 7002641 |
Projection display apparatus with quarter phase difference plate and phase compensation element |
February 21, 2006 |
| There is disclosed a display apparatus including a polarizing beam splitter for splitting light from a light source, a reflective liquid crystal display element illuminated by light of a predetermined polarizing direction through the polarizing beam splitter, and a double refractive |
| 6992833 |
Color combining optical system, projection-type display optical system, projection-type image di |
January 31, 2006 |
| A color combining optical system which can suppress occurrence of a thermal problem and increase in size is disclosed. The color combining optical system comprises a first optical element which has a first optical film reflecting light having a first polarizing direction and transmit |
| 6991334 |
Polarization beam splitting optical system |
January 31, 2006 |
| A polarization beam splitting optical system is disclosed which reduces components of the P-polarization direction that are contained in polarized light that is analyzed upon being incident on a polarization splitting film in an inclined manner with respect to an optical axis of an o |
| 6942345 |
Projection type image display apparatus and image display system |
September 13, 2005 |
| In a projection type image display apparatus, when the angle of light incident on the multi-layer film of a polarizing beam splitter for synthesizing an optical path becomes uneven, the loss of the light occurs. So, the projection type image display apparatus of the present invention |
| 6937728 |
Verifiable anonymous channel |
August 30, 2005 |
| Two El Gamal ciphertexts, which are input to a two-input two-output unit switching gates SW forming a permutation network, are randomized with a random number and randomly permuted, and a zero-knowledge proof, which proves the correspondence between the inputs and outputs of the switchin |
| 6918969 |
Cast steel and steel material with excellent workability, method for processing molten steel the |
July 19, 2005 |
| A cast steel with excellent workability, characterized in that not less than 60% of the total cross section thereof is occupied by equiaxed crystals, the diameters (mm) of which satisfy the following formula:wherein D designates each diameter (mm) of equiaxed crystals in terms of interna |
| 6845447 |
Electronic voting method and system and recording medium having recorded thereon a program for i |
January 18, 2005 |
| A voter V.sub.i encrypts his vote content v.sub.i with a public key k.sub.PC of a counter C, then concatenates the encrypted vote content x.sub.i with a tag t.sub.i to obtain a ballot z.sub.i, then randomizes it with a random number r.sub.i to create a preprocessed text e.sub.i, and |
| 6832548 |
Sheet feeding device and printer including the same |
December 21, 2004 |
| A sheet feeding device capable of again feeding, when failed to feed a sheet, the sheet by retry control is disclosed. The sheet feeding device includes a sheet tray loaded with a stack of sheets and a feed roller for sequentially feeding the sheets from the sheet tray one by one. A lead |
| 6831706 |
Projection image display apparatus |
December 14, 2004 |
| When light from a reflection image display element is incident on a polarization split surface at an angle other than 45.degree., leakage light that decreases the contrast of an image is produced. In a projection image display apparatus which illuminates an image display element with |
| 6774626 |
Device and method for measuring the properties of a magnetic reproducing head |
August 10, 2004 |
| A device for measuring a magnetic property of a magnetic reproducing head at a measurement point thereon, the device which applies a first magnetic field which oscillates at a predetermined oscillation frequency to the measurement point, applies a second magnetic field of which strength |
| 6645318 |
Fuel tank made of ferritic stainless steel |
November 11, 2003 |
| The present invention provides: a fuel tank made of a ferritic stainless steel sheet having long lasting corrosion resistance under the environment of the fuel tank and excellent in formability when fabricating the fuel tank; more specifically, a fuel tank made of a ferritic stainless st |
| 6639400 |
Method and apparatus for measuring magnetic head |
October 28, 2003 |
| In a magnetic head measuring apparatus for measuring a magnetic head, an amplitude-modulated electric current whose amplitude is modulated by a specified carrier wave frequency and modulation frequency is applied to a magnetic head. A calibrating magnetic field generating source causes t |
| 6617848 |
Magnetic head measuring apparatus and measuring method applied to the same apparatus |
September 9, 2003 |
| A magnetic head measuring apparatus executes measurement with respect to at least one measurement point on a recording head. The apparatus includes a probe having a magnetic substance, a vibrator which vibrates the probe above the at least one measurement point, a first signal generator |
| 6605941 |
Method and apparatus for measuring characteristic of specimen and its application to high freque |
August 12, 2003 |
| An apparatus for measuring a characteristic of a specimen, includes a probe for scanning a surface of the specimen in a noncontacting state, a vibrating unit for vibrating the probe, an excitation field generating unit for generating an amplitude modulation signal which is amplitude- |
| 6585799 |
Cast steel piece and steel product excellent in forming characteristics and method for treatment |
July 1, 2003 |
| A cast steel with excellent workability, characterized in that not less than 60% of the total cross section thereof is occupied by equiaxed crystals, the diameters (mm) of which satisfy the following formula:wherein D designates each diameter (mm) of equiaxed crystals in terms of interna |
| 6437562 |
Magnetic field characteristics evaluation apparatus and magnetic field characteristics measuring |
August 20, 2002 |
| There is disclosed a magnetic field characteristics evaluation apparatus for turning off a switching signal, measuring the surface of a magnetic field generating member in a magnetized state by AFM, and storing AFM signal together with a position signal corresponding to a scanning po |
| 6248461 |
Electric power generating system |
June 19, 2001 |
| An electric power generating system includes a cell such as a fuel cell for outputting direct-current power and a conversion device having at least either one of an inverter for converting the direct current power into alternating-current power and a converter for changing a voltage leve |
| 6132818 |
Method of marking with laser beam |
October 17, 2000 |
| Prepared is a transcribing plate comprising a glass substrate and a chromium film formed on a surface of the glass substrate. The transcribing plate is disposed on a surface of an object (for example, a glass substrate of a plasma display panel) such that the chromium film faces the |
| 5889862 |
Method and apparatus for implementing traceable electronic cash |
March 30, 1999 |
| In a method for implementing traceable electronic cash, a user US sends a bank BK a product N of prime numbers P and Q, a prime number L and his real name ID.sub.U, and the bank BK generates a pseudonym I corresponding to the real name ID.sub.U and keeps the correspondence between the re |
| 5563522 |
Microwave band probing apparatus |
October 8, 1996 |
| A microwave band probing apparatus includes a wafer stage for mounting a wafer on which a plurality of microwave integrated circuits are present, an RF probe head for transmitting a microwave signal to a prescribed one of the microwave integrated circuits, and a shielding member covering |
| 5514633 |
Desiccant for HFC-32 and HFC-152A |
May 7, 1996 |
| A method for the production of a desiccant for HFC-32, HFC-152a and blended refrigerants containing HFC-32 and/or HFC-152a comprises immersing formed articles of 3A type zeolite having 20 to 60% in ion equivalent weight of its sodium ions exchanged for potassium ions in an aqueous soluti |
| 5385681 |
Scouring agent composition for fabric |
January 31, 1995 |
| A scouring agent composition for a fabric which exhibits high penetrating and scouring powers even under highly alkaline conditions and can produce a scoured fabric excellent in rewettability and which can dissolve in a 11quid medium for current high-speed and automatic desiring, scourin |
| 5284535 |
Method of manufacturing an austenitic stainless steel sheet and a manufacturing system for carry |
February 8, 1994 |
| A method of manufacturing an austenitic stainless steel sheet having reduced minute surface concavities and convexties ropings and gloss unevenness and a manufacturing system for carrying out the same are provided. The method comprises (a) a casting process of casting a molten austen |
| 5282871 |
Spinning lubricant composition for acrylic fiber |
February 1, 1994 |
| A spinning lubricant composition for acrylic fiber, comprising:(a) at least one wax having a melting point of 30 to 130 degree, selected from the group consisting of ester wax, paraffin wax, polyethylene wax and polyethylene oxide wax, and(b) at least one surfactant, being cationic or amphot |
| 5203073 |
Apparatus for assembling exterior parts of a motorcar |
April 20, 1993 |
| A method and apparatus for assembling exterior parts of a motorcar wherein assembling accuracy errors of a motor car body are determined by measuring positions of a plurality of reference points of said motorcar body. Correction data is calculated relating to respective assembling positi |
| 5190676 |
High-speed spinning oil composition containing an organophosphoric ester salt and an oxyalkylene |
March 2, 1993 |
| A high-speed spinning oil composition is disclosed, which comprises following components (A) and (B):(A) an organophosphoric ester salt of formula (1):wherein M.sup.+ is an alkali metal ion, ammonium ion or an amine ion; X.sup.- is an organophosphoric ester anion of formula (2): ##STR1 |
| 5150506 |
Method of assembling exterior parts of a motorcar onto a motorcar body |
September 29, 1992 |
| A method for assembling exterior parts of a motorcar wherein assembling accuracy errors of a motor car body are determined by measuring positions of a plurality of reference points of said motorcar body. Correction data is calculated relating to respective assembling positions of plural |
| 5107891 |
Safety device for gas welding |
April 28, 1992 |
| A safety device for gas welding has a cylindrical main body having a flow path for an inflammable gas. A cylindrical cover is mounted on the outer periphery of the main body in such a manner that it can reciprocate on the outer periphery. The main body is provided with a normal-flow indi |
| 5030296 |
Process for production of Cr-Ni type stainless steel sheet having excellent surface properties a |
July 9, 1991 |
| A process in which a cast strip of Cr-Ni type stainless steel having a thickness close to a product thickness is prepared by the synchronous continuous casting. By subjecting the cast strip just below the casting machine to rapid cooling in the high-temperature region, hot-working or |
| 4883544 |
Process for preparation of austenitic stainless steel having excellent seawater resistance |
November 28, 1989 |
| In a continuously cast piece of austenitic stainless steel having a large amount of Mo, segregation of alloy elements such as Mo and Cr is caused at the center part in the thickness direction of the slab, and the .sigma.-phase is precipitated during the step of cooling the cast piece. |
| 4752117 |
Objective lens driving device |
June 21, 1988 |
| Disclosed is a device for driving an objective lens of an optical disk apparatus in both the tracking direction and the focusing direction. The device comprises a rocker arm supported rotatably and axially slidably by a supporting shaft and carrying the objective lens on its front end, a |
| 4497003 |
Disc positioning device |
January 29, 1985 |
| A disc positioning device for positioning a disc having a center opening with respect to a spindle for driving the disc for rotation by bringing the center axes thereof into alignment with each other. An adapter in the form of a hemispherical body of a diameter greater than that of the c |
| 4252540 |
Stabilizer for mixture fuels |
February 24, 1981 |
| A stabilizer for mixture fuels of finely divided coal and fuel oil comprises as an active ingredient a non-ionic surface active agent consisting of a block copolymer represented by the following general formula (I):wherein R.sup.1 and R.sup.2 stand for a hydrogen atom or an alkly group |
| 4233582 |
Deflection yoke for use with wide angle deflection system |
November 11, 1980 |
| A yoke adapted for use with a wide deflection angle picture tube used in a television receiver set is disclosed, in which a horizontal yoke is of saddle-shape and a fringe thereof is of non-circular shape so that a raster scanned on the picture tube shows no vertical pincushion disto |
