| Patents for G01V 8 - Prospecting or detecting by optical means (8,157) |
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| 08/15/1989 | US4857746 Method for producing an optocoupler |
| 08/10/1989 | WO1989007277A1 Optical motion sensor |
| 08/10/1989 | WO1989007276A1 Photoelectric barrier grid |
| 08/09/1989 | EP0326942A2 Infrared sensor |
| 08/08/1989 | US4855608 Laser curtain having an array of parabolic mirrors each focusing radiation on a corresponding detector positioned in mirror's focal point |
| 07/19/1989 | EP0324583A2 Remote sensing system |
| 07/18/1989 | US4849635 Intruder perceiving apparatus by means of infrared detection |
| 07/11/1989 | US4847488 Sabotage resistant light barrier wherein radiation is polarized into two opposite types of polarization |
| 07/11/1989 | US4847487 Device for detecting the presence of products in related seats and any irregularity in the base section of these products when already located in their related seats |
| 07/05/1989 | EP0323266A2 Suppressed transient uniform detection sensitivity pir detector |
| 06/29/1989 | WO1989005986A1 Infrared detector |
| 06/27/1989 | US4842247 Method and apparatus for the detection of helicopters |
| 06/21/1989 | EP0321051A2 Pyroelectric infrared sensors |
| 06/20/1989 | US4841144 Dust-proof tube having a cylindrical portion that seals photosensor and integrally formed frustrum portion |
| 06/14/1989 | EP0320436A2 Method and device for recognizing and approaching a spatial reference |
| 06/13/1989 | US4839605 Signal compensation circuits |
| 06/08/1989 | DE3740326A1 Safety device for gates which can be pivoted or displaced by a motor, in particular gates for shutting off entranceways to properties |
| 05/24/1989 | EP0316755A2 Optical system |
| 05/18/1989 | WO1989004496A1 Millimeter wave imaging device |
| 05/16/1989 | US4831259 Pyrodetector suited for movement-selective and direction-selective detection |
| 05/16/1989 | CA1254279A1 Broken filament detector and system therefor |
| 05/10/1989 | EP0314921A2 Apparatus for the determination of mass flow |
| 05/09/1989 | US4829174 Flexible tube optical intrusion detector |
| 05/03/1989 | EP0314475A1 Bore hole scanner |
| 05/03/1989 | CN1004102B Optical circuit |
| 05/02/1989 | US4827133 Infrared space surveillance detector circuit |
| 04/26/1989 | EP0313162A2 Control and remote control of a switchable battery-fed device by the approach to or the departure from the vicinity by a user |
| 04/18/1989 | US4822995 Use in an optical system |
| 04/18/1989 | CA1252908A1 Lead sense system for component insertion machines |
| 04/13/1989 | DE3732230A1 Installation device with an infrared receiver for an adjusted irradiation region |
| 04/12/1989 | EP0310932A2 Light barrier with reflector |
| 04/04/1989 | US4818887 Arrangement for the recognition of obstacles for motor vehicles |
| 04/04/1989 | US4818859 Low profile opto-device assembly with specific optoelectronic lead mount |
| 04/04/1989 | US4818132 Optical sensor protective member |
| 03/28/1989 | US4816667 Reflection light barrier employing adjacent lenses having bordering pupils |
| 03/14/1989 | US4812003 Optic sensing assembly |
| 03/09/1989 | DE3728354A1 Light-barrier arrangement |
| 03/08/1989 | EP0305465A1 Method for detecting diamonds in remote locations |
| 03/07/1989 | US4809514 Apparatus for removing snow deposited on wall of snow generating apparatus |
| 02/28/1989 | US4808809 Device for optically detecting the presence or absence of an object on an optical path including a variable I-V characteristic circuit to effect in a positive feedback relationship between the radiation source and the radiation detector |
| 02/08/1989 | CN1030989A Method and a device for determining the number of people present in a determined space |
| 02/01/1989 | EP0301659A2 Infrared lens arrays |
| 01/31/1989 | US4801797 Optical position input device |
| 01/17/1989 | US4799268 Lead sense system for component insertion machine |
| 01/10/1989 | US4797544 Optical scanner including position sensors |
| 01/04/1989 | EP0298059A1 Device for the selective detection of objects |
| 01/04/1989 | EP0297665A2 Radiation source detection |
| 01/03/1989 | US4795913 High resolution optical fiber array and article position determining system |
| 01/03/1989 | US4795900 Optical switch device employing a fluorescent substance with a radioactive element as a light source |
| 12/27/1988 | US4794248 Detection device having energy transmitters located at vertically spaced apart points along movable doors |
| 12/21/1988 | EP0296011A1 Method and device for determining the number of persons present in a determined room |
| 12/21/1988 | EP0295489A1 Error detection system for two-state fiber optic sensors |
| 12/15/1988 | WO1988009978A1 Process and device for determining the number of persons present in a given space |
| 12/14/1988 | EP0295006A2 An optical sensor |
| 12/13/1988 | US4791299 Infrared ray sensing device |
| 12/06/1988 | US4789778 Two terminal light barrier system |
| 12/01/1988 | WO1988009513A1 Device for the selective detection of objects |
| 11/29/1988 | CA1245741A1 Drop detection system with mirror element |
| 11/24/1988 | DE3716389A1 Test device for perforated sheet metal parts |
| 11/22/1988 | US4786800 Fluid drop detection and discrimination system |
| 11/17/1988 | WO1988009024A1 Temperature compensated detector for sensing and/or measuring passing objects |
| 11/15/1988 | CA1244901A1 Infrared intrusion detector |
| 11/09/1988 | EP0290413A2 Detector for sensing and/or measuring passing objects |
| 11/09/1988 | EP0289833A2 Sensor and method for detecting the presence of air bubbles in liquid |
| 11/03/1988 | DE3712865A1 Method for detecting moving targets by means of an optronic (electrooptic) image recording device (camera) |
| 11/02/1988 | EP0289185A2 Optic sensing assembly |
| 11/01/1988 | US4781742 Method and apparatus for detecting unwanted materials among cullet |
| 10/25/1988 | CA1243746A1 Fluid drop detection system |
| 10/18/1988 | US4779201 Borehole scanner and sonde position locator for spectral analysis of wall |
| 10/18/1988 | US4779095 For use with a vehicle to be monitored |
| 10/12/1988 | EP0286374A2 Apparatus and method for sensing and preventing incontinent episodes |
| 09/28/1988 | EP0283760A1 Device for detecting the passage of a moving organ in a reference position |
| 09/27/1988 | US4774404 Optical path blockage detecting device |
| 09/22/1988 | WO1988007213A1 Method for detecting diamonds in remote locations |
| 09/14/1988 | EP0282009A2 Fibre-optic detector for oils and solvents |
| 09/14/1988 | EP0281748A2 Reflective light barrier |
| 09/14/1988 | EP0281747A2 Light curtain |
| 09/13/1988 | CA1242015A1 Article or seed counter |
| 09/06/1988 | US4769545 Motion detector |
| 09/06/1988 | US4769535 Dustproof structure for optical coordinate input apparatus |
| 09/06/1988 | US4769532 Apparatus for adjusting optical sensors with threshold memory |
| 09/06/1988 | CA1241722A1 Infrared intrusion detector |
| 08/30/1988 | US4768020 Hot body intrusion activated light control unit with daylight photocell deactivation override |
| 08/30/1988 | CA1241404A1 Detection means |
| 08/25/1988 | WO1988006062A1 Device and method for visual identification of sample positions in plates with multiple wells, and use of the device |
| 08/17/1988 | EP0277964A1 Optical scanner including position sensors. |
| 08/16/1988 | CA1240762A1 Electrical controller having a window discriminator |
| 08/16/1988 | CA1240754A1 Dirt insensitive optical paper path sensor |
| 08/09/1988 | US4762992 Error detection system for two-state fiber optic sensors |
| 08/03/1988 | EP0276304A1 Method and apparatus for detecting incongruities, such as air bubbles, in fluid material. |
| 07/28/1988 | DE3701340A1 Obstruction detection device |
| 07/21/1988 | DE3700617A1 Signal barrier safety device |
| 07/12/1988 | US4757190 Optical circuit |
| 07/06/1988 | EP0273433A2 Reflection type photoelectric switch |
| 07/05/1988 | US4755687 System and method for detecting flames |
| 07/05/1988 | US4755674 Infrared detector |
| 06/29/1988 | EP0272637A2 Method of and apparatus for detecting precence or absence of photosensitive object at a prescribed position |
| 06/21/1988 | US4752769 Infrared motion alarm |
| 06/21/1988 | US4752768 Intruder detector with anti-obscuring means |
| 06/21/1988 | US4752690 Method and apparatus for detecting incongruities, such as air bubbles, in fluid material |