Searching US Patent Collection...

	PAT. NO.		Title
1	6,511,186		Focus and aim device and method for image projection
2	6,420,706		Optical detectors using nulling for high linearity and large dynamic range
3	4,376,303		Quasi-zoom lens optical focus sensor
4	4,375,096		Multi-bandwidth optical playback apparatus with elongated read spot
5	4,142,772		Redundant hologram recording method employing temporal information signal
6	4,054,357		Providing a representation of information stored in a hologram
7	4,035,055		Coherent wave imaging and/or recording technique for reducing the generation of spurious coherent-wave image patterns
8	4,030,815		Hydrostatic bearing apparatus
9	3,632,869		PARTIALLY OVERLAPPING HOLOGRAM MOTION PICTURE RECORD