| Patents for G01V 8 - Prospecting or detecting by optical means (8,157) |
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| 08/14/1991 | EP0440956A2 Method and apparatus of photodetection |
| 08/14/1991 | DE4004408A1 IR temp. sensor for high temps. |
| 08/13/1991 | US5038488 Protective arrangement for a longitudinally extendible machine component |
| 07/30/1991 | US5036187 Photodetecting circuit with compensated integration signal |
| 07/25/1991 | DE4101206A1 Pulsed light barrier transmitting light modulated by noise generator - has sync. demodulation correlating received signal with noise generator signal |
| 07/25/1991 | DE4001286A1 Locating, recognising and/or exposing fossiles - applying laser beams by scanning unit to sediment layers |
| 07/24/1991 | EP0198909B1 Drop detection system with mirror element |
| 07/23/1991 | US5034810 Two wavelength in-situ imaging of solitary internal waves |
| 07/23/1991 | US5033858 Detection of contaminants in a liquid stream |
| 07/16/1991 | US5032716 Motion triggered device/triggered message delivery system |
| 07/16/1991 | US5032715 Apparatus and method for counting containerized items |
| 07/11/1991 | WO1991010221A1 Machine proximity sensor |
| 07/04/1991 | DE4027367C1 Deposit detector for outer surface of pane - uses radiation source and receiver at right angles to pane esp. windscreen to detect rain drops |
| 06/18/1991 | US5025169 Sensor in IC formation |
| 06/13/1991 | WO1991005902A3 Process and device for opto-electronic detection of an edge of a workpiece to be stitched |
| 06/13/1991 | WO1991005901A3 Process and device for detecting the edge of a workpiece |
| 06/12/1991 | EP0431299A2 Two wavelength in-situ imaging of solitary internal waves |
| 06/11/1991 | US5023444 Machine proximity sensor |
| 06/08/1991 | CA2028885A1 Two wavelength in-situ imaging of solitary internal waves |
| 05/29/1991 | DE3939191A1 Multibeam one-way light barrier - uses diodes transmitting pulse-gap modulated pulses with route marking characteristic to monitor protected area |
| 05/21/1991 | US5017792 Method and apparatus for detecting a sheet strip material misfeed condition |
| 05/21/1991 | US5017775 Optical apparatus for detecting cavitation bubbles in liquids |
| 05/15/1991 | EP0426677A1 Detection circuitry. |
| 05/14/1991 | US5015857 Infrared detector |
| 05/14/1991 | US5015840 Self-checking light curtain system and method of operation |
| 05/08/1991 | EP0332656A4 Motion detector |
| 05/02/1991 | WO1991005902A2 Process and device for opto-electronic detection of an edge of a workpiece to be stitched |
| 05/02/1991 | WO1991005901A2 Process and device for detecting the edge of a workpiece |
| 04/30/1991 | US5012086 Optoelectronic pickup for stringed instruments |
| 04/25/1991 | DE4030854A1 Verfahren und vorrichtung zum optoelektronischen erkennen einer naehgutkante Method and device for optoelectronic recognize a fabric edge |
| 04/25/1991 | DE3934933A1 Anordnung und verfahren zum detektieren einer werkstueckkante Arrangement and method for detecting a werkstueckkante |
| 04/17/1991 | EP0422685A2 Photoelectric switch |
| 04/17/1991 | EP0248903B1 Process and circuit for compensating changes in the parameters of an optical emitter and an optical receiver in an optical scanner |
| 04/16/1991 | US5008532 Light reception signal circuit for photoelectric switch |
| 04/16/1991 | US5008531 Pulsed light identifying system |
| 04/16/1991 | US5008529 Photoelectric switching apparatus of reflection type projecting red and infrared light |
| 04/16/1991 | US5008522 Device for the selective detection of objects |
| 04/14/1991 | WO1991006018A1 Obstruction detection apparatus |
| 04/14/1991 | CA2066613A1 Obstruction detection apparatus |
| 04/03/1991 | EP0420657A2 Moving object detecting system |
| 04/02/1991 | US5004908 Reflection type photoelectric switch for detecting the presence of an object |
| 03/27/1991 | EP0418989A2 Light barrier |
| 03/26/1991 | US5003169 Photoelectric switch having changeable length |
| 03/20/1991 | EP0417388A2 Body vibrator |
| 03/19/1991 | US5001650 Method and apparatus for search and tracking |
| 03/19/1991 | US5001557 Method of, and apparatus for, controlling the position of an automatically operated door |
| 03/19/1991 | US5001339 Opto-electronic sensing method and device for an acoustic piano |
| 03/19/1991 | CA1281791C Joystick device |
| 03/13/1991 | EP0416607A2 Foreign object detecting method and device |
| 03/05/1991 | US4998014 Optical coordinate-input system |
| 02/26/1991 | US4996415 Apparatus for detecting the presence and position of an object |
| 02/19/1991 | US4994671 Apparatus and method for analyzing the composition of formation fluids |
| 02/19/1991 | CA1280523C Signal processing circuits |
| 02/13/1991 | EP0412447A1 Method and apparatus for controlling fibre material contaminated with foreign matter |
| 02/05/1991 | US4990768 Electronic apparatus including photoelectric switch |
| 01/29/1991 | WO1991002268A1 Electrical switching system |
| 01/29/1991 | CA2053314A1 Electrical switching system |
| 01/22/1991 | US4987296 Rain sensor with improved avoidance of reflected light |
| 01/17/1991 | DE3922218A1 Safety system identifying persons by their heat radiation - self monitors evaluating circuit for detector, IR sensor(s), load relay and cable and plug connections |
| 01/08/1991 | US4983838 Pyroelectric element |
| 12/18/1990 | US4978858 Optical web detection and measurement system especially adapted for controlling replenishment of x-ray film processing chemicals |
| 12/18/1990 | US4978843 Photoelectric sensor having a folded light path |
| 12/18/1990 | US4977984 Apparatus and method for detecting elevator car position in a door zone |
| 12/18/1990 | CA1278063C Detection of a glass sheet heated to deformation temperature |
| 12/13/1990 | WO1990015362A1 Optical web detection and measurement system, especially adapted for controlling replenishment of x-ray film processing chemicals |
| 12/04/1990 | CA1277397C Intrusion detection system for operating industrial machines |
| 11/28/1990 | EP0399180A2 Method and apparatus for search and tracking of targets |
| 11/22/1990 | EP0397757A1 Photoelectric barrier grid. |
| 11/07/1990 | EP0396453A1 Safety system for universal attachment to existing garage door openers |
| 11/07/1990 | EP0205561B1 Fluid drop detection system |
| 10/30/1990 | US4967183 Method of intrusion detection over a wide area |
| 10/30/1990 | US4967069 Spherical photoelectric sensor |
| 10/30/1990 | CA1275588C Apparatus and process for object analysis by pertrubation of interference fringes |
| 10/24/1990 | EP0393774A1 Circuit and data transmission device containing such activation |
| 10/04/1990 | DE3909814A1 Glass-break alarm device for monitoring window panes |
| 09/26/1990 | EP0388603A1 Method and apparatus for covertly viewing a target using infrared radiation |
| 09/26/1990 | EP0388502A1 Optical measuring device for detecting cavitation bubbles in fluids |
| 09/25/1990 | CA1274600A1 Detecting unwanted materials among cullet |
| 09/19/1990 | EP0387556A2 Infra-red detector |
| 09/18/1990 | US4958067 Method and apparatus for optically detecting the location of a control object in a control panel recess |
| 09/12/1990 | EP0386152A1 Millimeter wave imaging device. |
| 09/11/1990 | CA1273815A1 Method of observing bore holes, and apparatus therefor |
| 08/28/1990 | US4952800 Photoelectric switch with heating responsive to temperature and light |
| 08/23/1990 | WO1990009627A1 Method of setting teaching data in a visual sensor system |
| 08/07/1990 | US4947044 Method and apparatus for covertly viewing a target using infrared radiation |
| 08/01/1990 | EP0380400A1 Device and method for electronically checking the passing of clients at the entrance of a shop |
| 08/01/1990 | EP0380186A2 A signal processing system for an article counter |
| 07/31/1990 | US4945249 For detecting an anomaly at or near a water or land surface |
| 07/31/1990 | US4944116 Sensor strip |
| 07/31/1990 | CA1272156A1 Optical milk flow detector and vacuum shutoff for milker |
| 07/26/1990 | WO1990008092A1 Detector systems |
| 07/26/1990 | DE3841665A1 Circuit for monitoring the function of a light barrier |
| 07/24/1990 | US4943717 Angle measuring device having specific signal processing arrangement |
| 07/17/1990 | US4942618 Method and apparatus for determining the shape of wire or like article |
| 07/17/1990 | US4942385 Photoelectric intrusion detector |
| 07/10/1990 | US4941106 Apparatus for recognizing and approaching a three-dimensional target |
| 07/10/1990 | US4940889 Method and apparatus for visual indication of optical alignment of photoelectric switch |
| 07/03/1990 | US4939359 Intrusion detection system with zone location |
| 07/03/1990 | US4939358 Switch apparatus including a pair of beam-type switches |
| 06/28/1990 | WO1990007130A1 Millimiter-wave imaging system, particularly for contraband detection |