| Patents for H01G 7 - Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture (2,230) |
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| 06/29/1982 | CA1126851A1 Electret transducer backplate, electret transducer and method of making an electret transducer |
| 06/23/1982 | EP0054420A2 Functional electric devices |
| 04/29/1982 | WO1982001456A1 Apparatus for the rapid continuous corona poling of polymeric films |
| 04/29/1982 | WO1982001455A1 Corona discharge poling process |
| 04/28/1982 | EP0050332A1 Corona discharge poling process |
| 04/28/1982 | EP0050185A1 Apparatus for the rapid continuous corona poling of polymeric films |
| 04/27/1982 | CA1122722A1 Method of manufacturing an electret device |
| 04/27/1982 | CA1122546A1 Melt-blown fibrous electrets |
| 04/07/1982 | EP0048902A2 Method for manufacturing electret device and condenser type electro-acoustic transducer having electrets |
| 01/13/1982 | EP0043775A1 Capacitive sensor and method of making it |
| 01/06/1982 | EP0043001A1 Humidity sensor and method of manufacturing it |
| 12/29/1981 | US4308370 Stretched and polarized polyvinylidene fluoride |
| 12/29/1981 | US4308223 Method for producing electret fibers for enhancement of submicron aerosol filtration |
| 11/24/1981 | US4302633 Electrode plate electret of electro-acoustic transducer and its manufacturing method |
| 11/03/1981 | US4298719 Doubly oriented film of polyvinylidene fluoride |
| 10/27/1981 | USRE30782 Method for the manufacture of an electret fibrous filter |
| 10/13/1981 | CA1110727A1 Laminated capacitive touch-pad |
| 09/22/1981 | US4291245 Vapor deposited parylene film |
| 09/22/1981 | US4291244 Electrets |
| 09/16/1981 | EP0035536A1 Method of manufactoring adjustable thick film capacitors. |
| 09/09/1981 | EP0035425A1 Process for producing electromechanic transducers using at least one polymer film, and apparatus for carrying out this process |
| 09/08/1981 | US4288584 Electret made of branched alpha-olefin polymer |
| 09/01/1981 | CA1107950A1 Electret made of branched alpha-olefin polymer |
| 08/11/1981 | CA1106982A1 Polarization of a multi-ply stack of piezoelectric- forming resin pellicles |
| 07/29/1981 | EP0032738A2 Metallized film capacitor |
| 07/28/1981 | US4281072 Solid solutions used for electret films, dielectric absorbers, microwave oven seals or dielectric welding material |
| 07/14/1981 | CA1105153A1 Stabilization of piezoelectric resin elements |
| 05/05/1981 | US4266088 Method of making electret means |
| 05/05/1981 | CA1100573A1 Electrode bearing amorphous devices |
| 04/14/1981 | US4261287 Method for manufacturing sensitive elements having a permanent electric polarization and device for performing the same |
| 03/19/1981 | WO1981000786A1 Capacitor laser trimmed and method of making |
| 02/03/1981 | US4249043 Electret transducer backplate, electret transducer and method of making an electret transducer |
| 01/27/1981 | US4247796 Electrostatic transducer for generating strobe signals |
| 01/21/1981 | EP0022630A1 Method and apparatus for implanting a charge in an electret foil |
| 01/13/1981 | US4245329 Elongated seismic receiver of continuous structure |
| 12/16/1980 | US4239608 Method for producing piezoelectric polymeric material |
| 11/12/1980 | EP0018802A1 Process for preparing a piezoelectric pyroelectric film, and capacitors, piezoelectric and pyroelectric devices incorporating the film |
| 09/23/1980 | CA1086247A1 Electroconductive hose for cleaner |
| 09/02/1980 | CA1084853A1 Service pole assembly |
| 08/05/1980 | US4215682 Melt-blown fibrous electrets |
| 07/22/1980 | US4213797 Radiant energy to electric energy converter |
| 07/15/1980 | US4213168 Electret charge technique |
| 07/15/1980 | CA1081864A1 Manufacture of electrically polarized responsive elements |
| 05/27/1980 | US4205242 Electret bistable system |
| 05/20/1980 | US4204135 Piezoelectric elements of organic high molecular weight materials |
| 04/29/1980 | US4200701 Solid solution of a polymer containing ether groups and a metal salt |
| 03/25/1980 | US4195355 Vacuum deposition of potassium nitrate, silicon monoxide |
| 01/29/1980 | US4185972 Electric charge holding structure for electretized air-filter medium |
| 12/18/1979 | CA1068445A1 Stable electrets of styrene-type polymers |
| 11/20/1979 | US4174979 Generating electrical current and charging strip of electret material with it |
| 11/06/1979 | US4173659 Method for manufacturing sensitive elements having a permanent electric polarization |
| 10/17/1979 | EP0004764A1 A transducer for generating strobe signals |
| 09/25/1979 | US4169280 Method for making glass nonfogging |
| 09/04/1979 | CA1061687A1 Method of polarization of a ferroelectric material |
| 08/28/1979 | CA1061401A1 Device for the supply of an electric discharge lamp |
| 07/31/1979 | US4163162 Bistable electret system |
| 07/10/1979 | US4160927 Electrical battery |
| 06/13/1979 | EP0002363A1 Electret transducer and method of making an electret transducer |
| 06/05/1979 | CA1056069A1 Electrically compensated sensor |
| 05/29/1979 | US4156887 Pyridine, quinoline or 1,10-phenanthroline compound having reversible phase transition |
| 05/08/1979 | CA1054244A1 Ferroelectric ceramic devices |
| 05/01/1979 | US4152597 Apparatus including effectively intrinsic semiconductor for converting radiant energy into electric energy |
| 04/24/1979 | US4151409 Direct current variable capacitance electric generator |
| 04/10/1979 | US4149095 Monolithic structure for storing electrical charges |
| 03/13/1979 | CA1050481A1 Method for the manufacture of an electret fibrous filter |
| 03/07/1979 | EP0001008A1 Method and apparatus for implanting an electret charge in a foil material, and product produced thereby |
| 02/21/1979 | EP0000785A2 Electrical devices including electrode-bearing amorphous solid material |
| 02/13/1979 | US4139908 Photovoltaic-ferroelectric data recorder |
| 01/24/1979 | EP0000449A1 Improvements in or relating to piezoelectric materials and to methods for producing such materials. |
| 12/19/1978 | US4130694 Lithium or sodium or potassium-niobium or tantalum oxides |
| 12/05/1978 | US4128489 Piezo-electric material |
| 11/28/1978 | US4127681 Polarized pellicular resin |
| 11/28/1978 | CA1043434A1 Capacity changer |
| 11/28/1978 | CA1043289A1 Poling machine |
| 11/14/1978 | CA1042386A1 Method for continuously polarizing thermoplastic film |
| 11/14/1978 | CA1042385A1 Method of polarizing a high molecular film |
| 10/31/1978 | US4123346 Electrophoretic device |
| 10/24/1978 | CA1040847A1 Piezoelectric ceramic compositions |
| 09/26/1978 | CA1039415A1 Method for producing thermoplastic film electric element |
| 09/12/1978 | CA1038155A1 Piezoelectric ceramics |
| 09/05/1978 | USRE29755 Piezoelectric transducer having a crystal orientation selected from (xyl) + 31.7° (±1°) and (xyl) + 76.7° (±1°) or symmetrical equivalent |
| 07/25/1978 | US4103341 Ferroelectric photovoltaic method and apparatus for transferring information |
| 07/18/1978 | US4101975 Optical memory with storage in three dimensions |
| 06/20/1978 | US4096393 Solar energy converter |
| 06/06/1978 | US4093884 Thin structures having a piezoelectric effect, devices equipped with such structures and in their methods of manufacture |
| 05/16/1978 | US4090212 Imaging device |
| 05/09/1978 | US4088391 Irregular ferroelectric element devised for single domain-wall motion |
| 04/25/1978 | US4086499 Vinyl toluene, tert-butyl styrene |
| 04/25/1978 | US4086124 Temperature gradients |
| 04/11/1978 | US4084101 Apparatus for converting radiant energy to electric energy |
| 03/14/1978 | US4079437 Machine and method for poling films of pyroelectric and piezoelectric material |
| 03/07/1978 | US4078183 Control devices of the relay type |
| 02/21/1978 | US4075449 Switch with electroluminescent indicator |
| 01/03/1978 | US4067056 Poling machine for continuous film of pyroelectric and/or piezoelectric material |
| 11/15/1977 | US4058729 Pyroelectric apparatus including effectively intrinsic semiconductor for converting radiant energy into electric energy |
| 11/08/1977 | US4057660 Method for producing thermoplastic film electric element |
| 11/01/1977 | US4055878 Stabilization of piezoelectric resin elements |
| 09/13/1977 | US4047998 Method of polarizing a thermoplastic resin film |
| 09/06/1977 | US4046704 High polymer electret |
| 09/06/1977 | US4046455 Irregular ferroelectric element devised for motion of plural domain-walls |