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Class Information
Number: 368/156
Name: Horology: time measuring systems or devices > Electrical time base > Solid state oscillating circuit type
Description: Subject matter wherein the time base includes an oscillating circuit containing solid-state electrical elements.

Sub-classes under this class:

Class Number Class Name Patents
368/157 For reciprocating or oscillating element 156

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8559276 System for timing a sports competition with two timing devices Oct. 15, 2013
8391105 Synchronization of a generated clock Mar. 5, 2013
8379492 Energy saving digital timepiece Feb. 19, 2013
8201991 Frequency corrector and clocking apparatus using the same Jun. 19, 2012
8130596 Electronic circuit controlling the operation of peripheral members of the watch Mar. 6, 2012
8009520 Method and system for operating an atomic clock using a self-modulated laser with electrical modulation Aug. 30, 2011
7729205 Low current microcontroller circuit Jun. 1, 2010
7697377 Portable timepiece and electronic apparatus Apr. 13, 2010
7580493 Electronic circuit Aug. 25, 2009
7486757 Optical driver including a multiphase clock generator having a delay locked loop (DLL), optimized for gigahertz frequencies Feb. 3, 2009
7476865 Radioactive decay based stable time or frequency reference signal source Jan. 13, 2009
7411867 Stable composite clock Aug. 12, 2008
7339854 Clock generator Mar. 4, 2008
7272078 Efficient clock calibration in electronic equipment Sep. 18, 2007
6958953 Real time clock circuit having an internal clock generator Oct. 25, 2005
6958951 Adaptive Kalman Filter process for controlling an ensemble clock Oct. 25, 2005
6956793 Phase clock selector for generating a non-integer frequency division Oct. 18, 2005
6888780 Method and system for operating an atomic clock with simultaneous locking of field and frequency May. 3, 2005
6567346 Absolute time scale clock May. 20, 2003
6542440 Power-saving electronic watch and method for operating electronic watch Apr. 1, 2003
6529447 Compensation of crystal start up for accurate time measurement Mar. 4, 2003
6229765 Electronic sunrise-dependent timepiece May. 8, 2001
6141296 Time-of-day clock assembly Oct. 31, 2000
6124765 Integrated released beam oscillator and associated methods Sep. 26, 2000
6069850 Method and apparatus for driving a battery-backed up clock while a system is powered-down May. 30, 2000
6008720 Portable timer alarm device with ear attachment Dec. 28, 1999
5943297 Calendar clock circuit for computer workstations Aug. 24, 1999
5910930 Dynamic control of power management circuitry Jun. 8, 1999
5812497 Hybrid-synchronous type clock synchronizing apparatus of which dominant gain greater than sum of other gains network therewith, and clock synchronizing method thereof Sep. 22, 1998
5706256 Clock frequency coordination for electromagnetic compatibility Jan. 6, 1998
5644271 Temperature compensated clock Jul. 1, 1997
5640373 Secure time keeping peripheral device for use in low-power applications Jun. 17, 1997
5617375 Dayclock carry and compare tree Apr. 1, 1997
5615177 Hybrid-synchronous type clock synchronizing apparatus of which dominant gain greater than sum of other gains, network therewith, and clock synchronizing method thereof Mar. 25, 1997
5555225 Clock generating circuit and microcomputer incorporating same Sep. 10, 1996
5502689 Clock generator capable of shut-down mode and clock generation method Mar. 26, 1996
5469409 Method for clock calibration in a position determination system Nov. 21, 1995
5461652 Clock control circuit Oct. 24, 1995
5412624 Real-life timer interval adjustment May. 2, 1995
5357491 Clock selection control device Oct. 18, 1994
5315566 Time scale computation system May. 24, 1994
5301171 Cross-monitored pair of clocks for processor fail-safe operation Apr. 5, 1994
5276661 Master clock generator for a parallel variable speed constant frequency power system Jan. 4, 1994
5274545 Device and method for providing accurate time and/or frequency Dec. 28, 1993
5245593 Clock producing apparatus for a PWM system digital to analog converter Sep. 14, 1993
5204845 Clock synchronization Apr. 20, 1993
4961119 Harmonic optical oscillator Oct. 2, 1990
4947382 Direct digital locked loop Aug. 7, 1990
4942559 Counter/timer circuit for a microcontroller Jul. 17, 1990
4912832 Method for making a timepiece stepping motor Apr. 3, 1990

1 2 3

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