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Class Information
Number: 331/158
Name: Oscillators > Electromechanical resonator > Crystal
Description: Subject matter wherein the frequency determining electrically driven material body is a crystal exhibiting the piezoelectric effect. Examples of such crystals are quartz, Rochelle salt, tourmaline or other crystal classes which do not possess a center of symmetry and wherein deformation of the crystal is proportional to the first power of the imposed electric field, the direction of deformation referring upon reversal of the field.










Sub-classes under this class:

Class Number Class Name Patents
331/164 Anode or cathode to grid crystal circuit 0
331/163 Crystal having three or more electrodes in circuit 23
331/162 Plural crystals in circuit 46
331/159 Plural tube 19
331/161 With crystal substitution 18
331/160 With means to limit crystal current or voltage 72


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Patent Number Title Of Patent Date Issued
8710931 Piezoelectric device and fabricating method thereof Apr. 29, 2014
8704604 Oscillators having arbitrary frequencies and related systems and methods Apr. 22, 2014
8704605 Class-AB XTAL circuit Apr. 22, 2014
8692626 Oscillation device Apr. 8, 2014
8686803 Crystal device and manufacturing method thereof Apr. 1, 2014
8680932 Oscillator Mar. 25, 2014
8680933 Temperature-compensated oscillator and electronic device Mar. 25, 2014
8674776 Oscillator circuit, oscillator, electronic apparatus, and activation method oscillator circuit Mar. 18, 2014
8674778 Method and system for correcting oscillator frequency drift Mar. 18, 2014
8669819 Electronic component package sealing member, electronic component package, and method for manufacturing electronic component package sealing member Mar. 11, 2014
8669823 Ovenized microelectromechanical system (MEMS) resonator Mar. 11, 2014
8669825 Temperature-compensated oscillator and electronic device Mar. 11, 2014
8659361 Function generator circuit Feb. 25, 2014
8659364 Oscillator device with crystal resonators Feb. 25, 2014
8653897 Devices, systems, and methods for controlling the temperature of resonant elements Feb. 18, 2014
8653898 Crystal oscillator circuit Feb. 18, 2014
8653900 Oscillator Feb. 18, 2014
8648662 Oscillator circuit with a fast transient Feb. 11, 2014
8643444 Common reference crystal systems Feb. 4, 2014
8643445 Crystal oscillator circuit Feb. 4, 2014
8638176 Slew rate edge enhancer Jan. 28, 2014
8638180 Piezoelectric vibrator manufacturing method, piezoelectric vibrator, oscillator, electronic device, and radio-controlled timepiece Jan. 28, 2014
8629730 Oscillator Jan. 14, 2014
8618889 Oscillation drive device, physical quantity measurement device and electronic apparatus Dec. 31, 2013
8618890 Angular velocity detection apparatus Dec. 31, 2013
8614607 Piezoelectric vibration element, piezoelectric vibrator, piezoelectric oscillator, and electronic device Dec. 24, 2013
8610513 Crystal oscillator Dec. 17, 2013
8593231 System and method for amplitude contorl of a crystal oscillator Nov. 26, 2013
8581670 Oscillation device Nov. 12, 2013
8581671 Oscillation device Nov. 12, 2013
8576020 Crystal oscillator and method of manufacturing the same Nov. 5, 2013
8570110 Surface mount type crystal unit Oct. 29, 2013
8565704 Method and apparatus for compensating an oscillator in a location-enabled wireless device Oct. 22, 2013
8566061 Method and system for signal generation via a temperature sensing crystal integrated circuit Oct. 22, 2013
8558629 Temperature-controlled crystal oscillating unit and crystal oscillator Oct. 15, 2013
8558627 Surface mount crystal oscillator and substrate sheet Oct. 15, 2013
8558630 Oscillator circuit and electronic apparatus including the same Oct. 15, 2013
8552806 Apparatus for supplying clock and method thereof Oct. 8, 2013
8552807 Electronic apparatus compensated through monitoring a status of GNSS receiver and related method thereof Oct. 8, 2013
8547182 Oven controlled crystal oscillator Oct. 1, 2013
8547180 Package, piezoelectric vibrator and piezoelectric oscillator Oct. 1, 2013
8542070 Piezoelectric vibrator, oscillator, electronic apparatus, and radio-controlled timepiece Sep. 24, 2013
8536951 Buffer for temperature compensated crystal oscillator signals Sep. 17, 2013
8536952 Oscillation device Sep. 17, 2013
8536953 Quartz oscillator module Sep. 17, 2013
8525607 Crystal oscillator with reduced acceleration sensitivity Sep. 3, 2013
8525600 Temperature-compensated crystal oscillator assembly Sep. 3, 2013
8514029 Piezoelectric vibrator, oscillator, electronic equipment and radio-controlled timepiece, and method of manufacturing piezoelectric vibrator Aug. 20, 2013
8514030 Oven-controlled crystal oscillator and manufacturing method of the same Aug. 20, 2013
8499186 Clock generator and USB module Jul. 30, 2013

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20










 
 
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