| Patents for G01L 21 - Vacuum gauges (1,613) |
|---|
| 01/09/1991 | EP0406723A2 Transducer for vacuum measurement |
| 01/09/1991 | EP0406460A1 Method for measuring pressure |
| 12/27/1990 | EP0404218A1 Integrated semiconductor circuit for thermal measurements |
| 11/14/1990 | EP0396843A2 Gas partial pressure sensor for vacuum chamber |
| 10/30/1990 | US4967157 Method and circuit for extending the range of a cold cathode discharge vacuum gauge |
| 10/24/1990 | CN1010129B Twice contrasting measurement method for degree of vacuum in tin can and measuring apparatus thereof |
| 10/02/1990 | US4959999 Vacuum gauge of thermo-conductive type with quartz oscillator |
| 09/12/1990 | CN1009579B Pn conjunction senser relative with the temperature changing |
| 08/28/1990 | CA1273225A1 Thermocouple vacuum gauge |
| 08/22/1990 | CN2060881U Calibriter for air film governor of diesel engine |
| 08/01/1990 | EP0379841A2 Gas pressure measuring apparatus |
| 08/01/1990 | EP0379840A2 Quartz tuning fork manometer |
| 08/01/1990 | EP0379839A2 Quartz tuning fork manometer |
| 08/01/1990 | CN2059985U On-line monitor for air leakage, negtive pressure fault in high-voltage vacuum switch |
| 07/17/1990 | US4941351 Transporter for a rotor of a gas friction manometer |
| 05/02/1990 | CN2056755U Nondestructive detector for can vacuum degree |
| 03/15/1990 | DE3830680A1 Friction vacuum gauge |
| 03/07/1990 | CN2054232U Vacuum reversible control cabinet of high voltage motor |
| 02/20/1990 | US4902977 Multipactor pressure gauge for use as a noninvasive vacuum tube sensor |
| 02/07/1990 | CN2052534U Combined nondestructive testing device for vacuum of tin |
| 12/26/1989 | US4888987 High sensitivity measurement device for measuring various parameters of non-electric quantity |
| 12/20/1989 | EP0347144A2 Vacuum gauge |
| 11/08/1989 | EP0340685A2 Composite vacuum pump |
| 10/11/1989 | CN1036263A Method and equipment for inspecting cans' vacuum automatically |
| 08/30/1989 | EP0330385A2 Pressure gauge with oscillating means |
| 07/11/1989 | US4847564 Cold-cathode ionization vacuum meter with auxiliary ignition system for very low pressure operation |
| 06/06/1989 | CA1255115A1 Thermocouple vacuum gauge |
| 05/30/1989 | US4833921 Gas pressure measurement device |
| 05/03/1989 | CN1032705A Twice contrasting measurement method for degree of vacuum in tin can and measuring apparatus thereof |
| 04/19/1989 | EP0312195A2 Method and device for measuring gas pressure |
| 03/14/1989 | US4812801 Solid state gas pressure sensor |
| 02/15/1989 | CN1003331B Extreme high vacuum separator |
| 02/07/1989 | US4803356 Method and apparatus for measuring degree of vacuum in an electron microscope |
| 01/18/1989 | CN2031094U Automatic detector for the degree of vacuum in can |
| 12/20/1988 | US4792763 Hot cathode ionization pressure gauge |
| 09/28/1988 | CN88200745U Instrument for testing degree of vaccum of can and pressure of light sparkling wine and drink |
| 07/05/1988 | US4755669 Vacuum monitoring apparatus |
| 06/22/1988 | EP0271769A1 Penning-type vacuum gauge |
| 06/22/1988 | CN87210360U Cathode conformal structure for high pressure ionization vacuum gauge |
| 06/01/1988 | CN86107738A Time-sharing multifunction sensing technique |
| 05/31/1988 | US4747311 Gas pressure gage |
| 05/25/1988 | EP0268207A2 High sensitivity measurement device for measuring various parameters of non-electric quantity |
| 05/19/1988 | DE3712874A1 Penning-type vacuum meter (gauge) |
| 05/18/1988 | CN87210214U Micro vacuometer power supply for hot cathode ionic gauge |
| 04/06/1988 | EP0262223A1 Detector for gas chromatograph |
| 03/08/1988 | US4729242 Conduction-responsive meter head |
| 03/08/1988 | US4729241 Measuring head for vacuum gauge |
| 01/19/1988 | CA1231551A1 Method of measuring the pressure in a vacuum package |
| 12/22/1987 | US4714891 Method and apparatus for improving the safety and extending the range of ionization gauge systems |
| 12/15/1987 | US4713619 Electronic device for feeding ion pump |
| 12/01/1987 | US4709578 Method and apparatus for determinating a vacuum degree within a flexible vacuum package |
| 11/17/1987 | CA1229241A1 Method of and apparatus for gas pressure measurement by the gas-friction principle |
| 10/14/1987 | CN87200798U Wide ranged semiconductor vacuum gauge |
| 09/23/1987 | EP0238297A2 Gas pressure gauge |
| 08/26/1987 | EP0233784A2 Vacuum monitoring apparatus |
| 07/28/1987 | US4682503 Silicon, chips, dielectrics, thin films, etching, grooves |
| 06/09/1987 | US4672323 Device for measuring the internal pressure of an operationally built built-in vacuum switch |
| 04/22/1987 | CN86106973A Electrically controlled standard piston-type pressure vacuum gauge |
| 04/14/1987 | US4656866 Method of measuring the pressure in a vacuum package |
| 03/24/1987 | US4652752 Vacuum gauge |
| 03/11/1987 | EP0213757A2 Thermocouple vacuum gauge |
| 03/10/1987 | CA1219087A1 Vacuum gauge |
| 02/03/1987 | US4640136 Method for the processing of measurement data in a gas friction vacuum meter and a gas friction vacuum meter equipped with a circuit for the practice of this method |
| 01/13/1987 | US4636680 Vacuum gauge |
| 01/06/1987 | US4633717 Thermocouple vacuum gauge |
| 11/26/1986 | EP0202547A2 Measuring head |
| 11/20/1986 | WO1986006836A1 Detector for gas chromatograph |
| 11/12/1986 | CN86103355A Gas chromatography detector |
| 10/28/1986 | US4619144 Method of and apparatus for gas pressure measurement by the gas-friction principle |
| 09/24/1986 | CN85200112U Emitting-current stabilizer with insufficient current amplificator for ionization vacuum gauge |
| 08/06/1986 | CN85100570A Extreme high vacuum separator |
| 06/24/1986 | US4596148 Tritium pressure measurement |
| 06/04/1986 | EP0183307A2 Electronic device for feeding an ion pump with two different tensions and for improved measuring of the pressure in said pump |
| 05/21/1986 | EP0181722A1 Method and apparatus for determinating a vacuum degree within a flexible vacuum package |
| 05/07/1986 | EP0180481A2 Thermocouple vacuum gauge |
| 04/09/1986 | EP0176735A2 Method of measuring pressure with a gas viscometer vacuum gauge and gas viscometer vacuum gauges for carrying out the method |
| 04/01/1986 | US4579002 Thermocouple vacuum gauge |
| 03/10/1986 | CN85100568A Hot cathode extreme high vacuum gauge |
| 12/20/1985 | CN85200266U Composite source of vacuum gage and mass spectrograph |
| 12/20/1985 | CN85200111U Constant temperature type thermocouples vacuum gauges. |
| 11/21/1985 | EP0161702A1 A method of measuring the pressure in a vacuum package |
| 10/08/1985 | US4546319 Vacuum testing method and apparatus |
| 09/17/1985 | US4541286 Gas pressure measuring circuit |
| 08/20/1985 | US4535633 Method and apparatus for the protection of analyzers and other sensitive components from soiling and corrosion |
| 08/07/1985 | EP0150389A1 Device for measuring the internal pressure of an industrial built-in vacuum switch |
| 07/17/1985 | EP0148296A1 Method and circuit for converting a measuring current into an impulse rate proportional to the measuring current |
| 07/03/1985 | EP0146647A1 Method of processing measured values of a gas friction vacuum meter, and a gas friction vacuum meter provided with a circuit for carrying out this method |
| 06/25/1985 | US4524625 Pressure sensor |
| 01/09/1985 | EP0130448A2 Process and device for protecting measuring units and other sensitive elements against pollution and corrosion |
| 01/08/1985 | US4492123 Thermal conductivity vacuum gage |
| 12/05/1984 | EP0126987A1 Ionization-gauge |
| 09/18/1984 | US4471661 Electronic-type vacuum gauges with replaceable elements |
| 09/11/1984 | US4471309 Vacuum detector |
| 05/22/1984 | US4450409 Pressure sensor and leak detector |
| 01/17/1984 | CA1160471A1 Gas friction vacuum meter and method of making measuring body |
| 10/18/1983 | US4409840 Vibrating vane pressure gauge |
| 08/02/1983 | US4395914 Gas friction vacuum meter and method of making measuring body |
| 02/16/1983 | EP0071694A1 Heat conductivity vacuum gauge |
| 01/25/1983 | US4369661 Automatic nulling circuit for transient pressure rate changes |
| 10/13/1982 | EP0062432A1 Vibrating vane pressure gauge |