Searching US Patent Collection...

	PAT. NO.		Title
1	4,561,087		Conductive video disc
2	4,296,144		Ion implanted stylus
3	4,220,915		Resistivity measurement system
4	4,152,641		Method and apparatus for the determination of signal pickup qualities of a stylus of a capacitive disc video player
5	4,080,625		Pickup circuitry for a video disc player with printed circuit board
6	4,058,776		Bias circuit for avalanche diodes
7	4,038,106		Four-layer trapatt diode and method for making same
8	4,027,179		High repetition rate injection laser modulator
9	3,996,610		Comb filter apparatus for video playback systems
10	3,953,809		Injection laser modulator
11	3,943,469		Mechanical structure for mounting microwave diode packages
12	3,926,693		Method of making a double diffused trapatt diode
13	3,855,605		CARRIER INJECTED AVALANCHE DEVICE
14	3,848,196		BROADBAND TRAPATT DIODE AMPLIFIER
15	3,683,298		MICROWAVE APPARATUS USING MULTIPLE AVALANCHE DIODES OPERATING IN THE ANOMALOUS MODE