| Patent Number |
Title Of Patent |
Date Issued |
| 6879167 |
Noncontact measuring system for electrical conductivity |
April 12, 2005 |
| The invention provides a noncontact measuring system for electrical conductivity, which uses a microwave. In the measuring system for electrical conductivity, the microwave generated in a network analyzer (NA) 110 is guided to a surface of a silicon wafer (sample) 160 through a waveg |
| 5146082 |
Image detecting unit having emitting means and light receiving means and method for arranging th |
September 8, 1992 |
| An image detecting unit includes a light emitting system for emitting a light beam which is projected onto a surface of a document and a light receiving system for receiving a light obtained by a reflection of the light emitted from the light emitting system on the surface of the medium. |
| 4937052 |
Underground chemical reactor |
June 26, 1990 |
| An underground chemical reactor having a closed loop reactor which includes at least a reaction component inlet tube and a reaction product outlet tube and a casing pipe consisting of a double or triple tube and the circulating system for a reaction component such as raw material sludge |
| 4924950 |
Method of drilling a well by utilizing AE/MA measurement |
May 15, 1990 |
| A method of drilling a well by utilizing AE/MA measurement which has the steps of monitoring an AE wave emitted at the periphery of the well, and drilling the well without lost circulation by providing lost circulation preventing means in the well if the energy of the AE wave emitted at |
| 4759214 |
Method for determining fracture toughness of rock by core boring |
July 26, 1988 |
| The disclosed method introduces a pressure effectivity factor h, so as to continuously determine fracture toughness K.sub.IC of rock during core boring by using the equation ofhere, N is the revolving speed of a coring bit, Q is the pressure supplied to it, L is its drilling speed, B is |
| 4665984 |
Method of measuring crustal stress by hydraulic fracture based on analysis of crack growth in ro |
May 19, 1987 |
| Earth's crustal stress is measured by drilling a bore-hole in rock body, producing a longitudinal crack at a selected portion thereof with or without a natural traverse crack through intermittent application of hydraulic pressure thereat while measuring the pressure at different stag |
