| |
 |
|
Class Information
Number: 250/570
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Including coded record > Digital information > Tape, drum, or disc types
Description: Subject matter wherein the record is in the shape of a narrow strip of flexible material a cylinder, or a flat circular form.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6946634 |
Optical pickup device |
Sep. 20, 2005 |
| 5682039 |
Media position sensing system having a plurality of apertures in the media edge margin |
Oct. 28, 1997 |
| 5352900 |
Ribbon tracking technique with low-ribbon detection |
Oct. 4, 1994 |
| 5294805 |
Method and apparatus for analyzing tracking error in magnetic tapes |
Mar. 15, 1994 |
| 5272352 |
Retrieval system |
Dec. 21, 1993 |
| 5245199 |
Mark detecting apparatus using active threshold comparison |
Sep. 14, 1993 |
| 5243196 |
Film image registration system with image filing and illumination control |
Sep. 7, 1993 |
| 5229620 |
System for integrated tape hole detection by detecting an edge of the tape and/or a pattern on the tape |
Jul. 20, 1993 |
| 5212388 |
Method for detecting tracking error in magnetic tapes with using an X-Y stage calibration means |
May. 18, 1993 |
| 5178063 |
Method and apparatus for automatic numbering of forms on a rotary printing press |
Jan. 12, 1993 |
| 5137347 |
Information retrieval apparatus |
Aug. 11, 1992 |
| 5130555 |
Tape crease inspecting method and apparatus having a stripe shaped pattern reflection plate |
Jul. 14, 1992 |
| 5086231 |
Microfilm retrieval system for retrieving a designated image frame |
Feb. 4, 1992 |
| 5015056 |
Photointerruptor for use in light-transmission type rotary encoder |
May. 14, 1991 |
| 4971414 |
Optical information record/read apparatus |
Nov. 20, 1990 |
| 4953933 |
Optical encoder reading device |
Sep. 4, 1990 |
| 4947050 |
Sensor bracket for magnetic tape cartridge drive |
Aug. 7, 1990 |
| 4939591 |
Contact-type image sensor |
Jul. 3, 1990 |
| 4906854 |
Processing method and apparatus for exposed and developed film with position sensing |
Mar. 6, 1990 |
| 4897540 |
Apparatus for detecting the presence or absence of overlap at tape joints |
Jan. 30, 1990 |
| 4870291 |
Splice inspection method and apparatus using light inclined at a prescribed angle |
Sep. 26, 1989 |
| 4864149 |
Method of detecting frame edge |
Sep. 5, 1989 |
| 4864122 |
Joint inspection apparatus for determining the size of a gap |
Sep. 5, 1989 |
| 4855987 |
Optical device comprising a holder accommodating an optical system which compensates for thermal expansion/contraction |
Aug. 8, 1989 |
| 4814589 |
Information transfer and use, particularly with respect to objects such as gambling chips |
Mar. 21, 1989 |
| 4743774 |
Method and apparatus for optical detection of information |
May. 10, 1988 |
| 4705958 |
Apparatus for reading an arbitrarily oriented image |
Nov. 10, 1987 |
| 4695991 |
Reading information stored in multiple frame format |
Sep. 22, 1987 |
| 4691112 |
Apparatus for the detection of optical marks on a film support moved relative to the apparatus |
Sep. 1, 1987 |
| 4687321 |
Mark detection apparatus for a micro-roll film |
Aug. 18, 1987 |
| 4687943 |
Optical motion picture film inspection system |
Aug. 18, 1987 |
| 4673815 |
Method of automatically detecting the locations of the frame lines of a reversal film and apparatus for carrying out the method |
Jun. 16, 1987 |
| 4665318 |
Recording medium mark detector |
May. 12, 1987 |
| 4652124 |
Film inspection system |
Mar. 24, 1987 |
| 4652125 |
Film inspection system |
Mar. 24, 1987 |
| 4611907 |
Method of judging film frame position |
Sep. 16, 1986 |
| 4612446 |
Web terminal detecting device |
Sep. 16, 1986 |
| 4607950 |
Mark detection apparatus for a micro-roll film |
Aug. 26, 1986 |
| 4570075 |
Optical end-of-tape detection device |
Feb. 11, 1986 |
| 4514641 |
Apparatus for retrieving information |
Apr. 30, 1985 |
| 4475179 |
Optical disc write/read methods and apparatus with improved focus and tracking control |
Oct. 2, 1984 |
| 4460977 |
Optical memory playback apparatus |
Jul. 17, 1984 |
| 4457008 |
Automatic retrieval apparatus |
Jun. 26, 1984 |
| 4453823 |
Method of stopping a film |
Jun. 12, 1984 |
| 4401394 |
Universal end of ribbon sensing system |
Aug. 30, 1983 |
| 4342996 |
Two disc encoder system for monitoring height of liquid in storage tank |
Aug. 3, 1982 |
| 4297585 |
System for the detection of splicing defects in film |
Oct. 27, 1981 |
| 4296332 |
Sprocket hole sensing detector for moving translucent paper sheets |
Oct. 20, 1981 |
| 4240066 |
Cylindrical encoder for use with fiber optics |
Dec. 16, 1980 |
| 4219737 |
Self regulating microfilm frame detection circuit |
Aug. 26, 1980 |
|
|
|
