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Class Information
Number: 369/121
Name: Dynamic information storage or retrieval > Specific detail of information handling portion of system > Radiation beam modification of or by storage medium > With particular light source (e.g., laser, crt with phosphor)
Description: Subject matter including either structural detail of a light source, or a light source characterized by a function or relationship additional to conventional light emission.

Sub-classes under this class:

Class Number Class Name Patents
369/123 Glow lamps 5
369/122 Solid state 229

Patents under this class:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
4238803 Information recording methods using lasers Dec. 9, 1980
4229763 Optical high density FM recording device with corrective signal Oct. 21, 1980
4223188 Scanning system for reproduction of optical sound tracks with clear area noise discriminator delay means Sep. 16, 1980
4223187 Method and apparatus for recording and reproducing a video-disc with an oscillated track Sep. 16, 1980
4219703 Sound reproduction device for talking books Aug. 26, 1980
4219848 Optical record playback apparatus employing light frequency at which alternate regions of record track exhibit anti-reflection condition Aug. 26, 1980
4205338 Disc recording tracking system May. 27, 1980
4190859 Tracking control apparatus for use in apparatus for reproducing video signals from a rotary recording medium Feb. 26, 1980
4189783 Mass storage of books Feb. 19, 1980
4183060 Capacitance distance sensor apparatus for video disc player/recorder Jan. 8, 1980
4176377 Video disc configuration Nov. 27, 1979
4163149 Automatic focusing apparatus Jul. 31, 1979
4152726 Record disk and method for producing the same with constant width groove May. 1, 1979
4150402 Method and apparatus for reducing the effect of laser noise in a scanning laser read system Apr. 17, 1979
4150398 Linear method of optically recording a video or other signal Apr. 17, 1979
4124784 Motion picture sound system Nov. 7, 1978
4123780 Signal noise filtration for laser beam recording system Oct. 31, 1978
4122551 Optical data storage and retrieval system Oct. 24, 1978
4118735 Synchronous detection tracking of video disc Oct. 3, 1978
4118736 Method of and apparatus for controlling the optical reading of recorded information Oct. 3, 1978
4115808 Optical signal play-back device with auto-focussing of a light beam at a record carrier surface Sep. 19, 1978
4114180 Closed loop laser noise elimination for optoelectronic recording Sep. 12, 1978
4110607 System for detecting height fluctuations of a surface on a recording medium in an optical recording or reproducing apparatus Aug. 29, 1978
4106058 Data disc optical reader containing a device for automatic data access Aug. 8, 1978
4106057 Dust proof optical system for optically reading and writing on a rotating record with the aid of a radiation beam Aug. 8, 1978
4100576 Electromagnetic optical beam controller having an eddy current damper for arresting mechanical resonance Jul. 11, 1978
4100577 Apparatus for optically reading signal information recorded on a reflective record medium surface Jul. 11, 1978
4087651 Optical sound recording system with inversely polarized sound signals May. 2, 1978
4065786 Videodisc playback system Dec. 27, 1977
4063287 Tracking mirror device for a video disc player Dec. 13, 1977
4059841 Optical read-out system including asymetrical beam intensity and four detector cells Nov. 22, 1977
4023185 Ablative optical recording medium May. 10, 1977
4005275 Wideband analog photorecording apparatus and method Jan. 25, 1977
3980818 Recorder and reproducer system Sep. 14, 1976
3971874 Optical information storage material and method of making it Jul. 27, 1976
3969593 Sound recording on color film by hue modulation Jul. 13, 1976
3963863 Device for reading out information recorded upon a substrate Jun. 15, 1976
3961315 Information recording system Jun. 1, 1976
3944727 Video disc player with movable mirror for directing light beam onto reflective disc Mar. 16, 1976

1 2 3 4 5 6 7 8 9 10

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