| Patent Number |
Title Of Patent |
Date Issued |
| 5422716 |
Method for on-site measurement of strobe light intensity on aircraft |
Jun. 6, 1995 |
| 5416620 |
Pockels cell with AC driving voltage at frequency of periodic variation of writing light source |
May. 16, 1995 |
| 5416326 |
Analog spatial filter for detection of unresolved targets against a cloud-cluttered background |
May. 16, 1995 |
| 5414269 |
Circuit for detecting a paper at a desired position along a paper feed path with a one shot multivibrator actuating circuit |
May. 9, 1995 |
| 5406391 |
Image sensing apparatus having tone control function |
Apr. 11, 1995 |
| 5404008 |
Control system for detecting intrusion of a light curtain |
Apr. 4, 1995 |
| 5392110 |
Method and device for measuring height of object whose surface has irregular reflectance |
Feb. 21, 1995 |
| 5376783 |
Power meter with background subtraction |
Dec. 27, 1994 |
| 5353111 |
Noise resistant laser system for machine alignment |
Oct. 4, 1994 |
| 5347120 |
Method and apparatus for pulsed-laser detection |
Sep. 13, 1994 |
| 5340979 |
Technique for determining the amplified spontaneous emission noise of an optical circuit in the presence of an optical signal |
Aug. 23, 1994 |
| 5338925 |
Apparatus for simultaneously detecting a plurality of discrete laser modulation frequencies having circuitry for background radiation canceling |
Aug. 16, 1994 |
| 5336882 |
System for determining operational stability of a photoelectric control unit having a margin variable gain module |
Aug. 9, 1994 |
| 5329117 |
Device for dispensing predetermined dosages of flowable material |
Jul. 12, 1994 |
| 5296697 |
Detection circuit for maintaining constant signal transfer characteristics of a light-sensitive detector |
Mar. 22, 1994 |
| 5295001 |
Image sensing apparatus having tone control function |
Mar. 15, 1994 |
| 5286967 |
Method and apparatus for self-biasing a light beam obstacle detector with a bias light |
Feb. 15, 1994 |
| 5268568 |
Marker dye band detector for gel electrophoresis using balanced light emitters |
Dec. 7, 1993 |
| 5258619 |
Pulsed bias radiation detector |
Nov. 2, 1993 |
| 5252817 |
Detector system for detecting the occurrence of welding using detector feedback |
Oct. 12, 1993 |
| 5250813 |
Print paper detecting circuits with gain reduction |
Oct. 5, 1993 |
| 5248880 |
Detector system for detecting the occurrence of welding |
Sep. 28, 1993 |
| 5243181 |
Noise-insensitive, photoelectric transceiver including a digital stability indicator |
Sep. 7, 1993 |
| 5239352 |
Multiple scattering technique (MUST) lidar |
Aug. 24, 1993 |
| 5235173 |
Process for positioning a light beam on a picture area |
Aug. 10, 1993 |
| 5208452 |
Method and apparatus for reliably detecting light beam in the presence of undesirable light, especially suitable for surveying instruments |
May. 4, 1993 |
| 5204778 |
Control system for automatic rearview mirrors |
Apr. 20, 1993 |
| 5196693 |
Method and apparatus of photodetection with maximum signal holding means |
Mar. 23, 1993 |
| 5182448 |
Photocoupler with improved anti-noise characteristics |
Jan. 26, 1993 |
| 5180907 |
Method and apparatus for the measurement of rapid light variation superimposed on a slowly changing background light intensity |
Jan. 19, 1993 |
| 5175529 |
Fast event detector |
Dec. 29, 1992 |
| 5173750 |
Reflection densitometer |
Dec. 22, 1992 |
| 5162644 |
Contact type image sensor having photoelectric conversion elements to reduce signal variation caused by luminous intensity variation of light source |
Nov. 10, 1992 |
| 5151591 |
Asynchronous signal interrogation circuit for an detection apparatus |
Sep. 29, 1992 |
| 5142134 |
Method for operating a circuit arrangement |
Aug. 25, 1992 |
| 5142142 |
Portable device for detecting short duration energy pulses |
Aug. 25, 1992 |
| 5140153 |
Circuitry for compensating for the effect of light on the operation of infrared-sensitive phototransistors in a contact display panel |
Aug. 18, 1992 |
| 5134277 |
Remote data transfer system with ambient light insensitive circuitry |
Jul. 28, 1992 |
| 5126555 |
Apparatus for preventing accidental activations of opto-electronic switches due to extraneous light |
Jun. 30, 1992 |
| 5119224 |
Apparatus and method for fiber optics communication with dark current correction |
Jun. 2, 1992 |
| 5113068 |
Photoelectrical sensor with multistaged, filtered amplifier circuit |
May. 12, 1992 |
| 5103085 |
Photoelectric proximity detector and switch |
Apr. 7, 1992 |
| 5099113 |
Photoelectrical switching circuit with frequency divider circuit |
Mar. 24, 1992 |
| 5095203 |
Article detection device and method with shift registers and sampling |
Mar. 10, 1992 |
| 5057683 |
Error preventive circuit for a photoelectric switch |
Oct. 15, 1991 |
| 5036187 |
Photodetecting circuit with compensated integration signal |
Jul. 30, 1991 |
| 5026981 |
Servo control gain adjustment for an optical disk apparatus |
Jun. 25, 1991 |
| 4947032 |
Detection circuit for a light-sensitive element which is substantially insusceptible to ambient light level |
Aug. 7, 1990 |
| 4945225 |
Signal discriminator |
Jul. 31, 1990 |
| 4898464 |
Method and apparatus for determining the position of an object |
Feb. 6, 1990 |
