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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4755956 | Freeze frame apparatus for moving map display system Apparatus for use with a moving map display system for freezing the moving map at a predetermined position. Analog video signals corresponding to the predetermined map position are digitized and stored in memory. The digitized signals are retrieved and co... | 07/05/1988 |
| 4688092 | Satellite camera image navigation Pixels within a satellite camera (1, 2) image are precisely located in terms of latitude and longitude on a celestial body, such as the earth, being imaged. A computer (60) on the earth generates models (40, 50) of the satellite's orbit and attitude, resp... | 08/18/1987 |
| 4658431 | Star sensor using CCD A star sensor which includes a charge-coupled device (CCD) for detecting light rays of a star and for producing an output representative of the distribution of the light rays of the star over the CCD. The CCD output is filtered and a detecting circuit is ... | 04/14/1987 |
| 4105912 | Radar viewing device The viewing screen of a radar apparatus contains a pair of luminescent layers having green and red luminescing colors respectively. The color of the radar image may be altered by photosensitive means responsive to ambient light which alters the anode volt... | 08/08/1978 |
| 3999007 | Aircraft visual approach/landing reproducer device and system A cockpit-mounted cathode ray tube presents to the pilot a visual equivalent of the approach/landing during obscure visibility of an aircraft which contains a miniature illuminated runway that is being "approached" by a video camera that reproduces the po... | 12/21/1976 |
| 3985446 | Remote controlled, CRT digital display, LLLTV camera-sextant A device to provide a ship's navigator with information day and night, as to the altitude of celestial bodies on a CRT display with digital display of the altitude and time on the CRT and/or LED read-out.... | 10/12/1976 |
