Frequency Electronics, Inc.

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Records under this name other than patents Frequency Electronics, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 8 of 8 · Back to Frequency Electronics, Inc.

Patent	Title	Status	Expires	Confidence
US 7,106,143	Method for achieving highly reproducible acceleration insensitive quartz crystal oscillators Term ended Term ended May 14, 2025 · From the USPTO record	Term ended	Term ended May 14, 2025	From the USPTO record
US 6,577,201	Precision oven-controlled crystal oscillator Term ended Term ended Dec 17, 2021 · From the USPTO record	Term ended	Term ended Dec 17, 2021	From the USPTO record
US 6,753,737	Precision oven-controlled crystal oscillator Term ended Ended no later than Dec 17, 2021 · From the USPTO record	Term ended	Ended no later than Dec 17, 2021	From the USPTO record
US 4,701,661	Piezoelectric resonators having a lateral field excited SC cut quartz crystal element Term ended Term ended no later than Oct 20, 2007 · Low confidence	Term ended	Term ended no later than Oct 20, 2007	Low confidence
US 4,748,367	Contact heater for piezoelectric effect resonator crystal Term ended Term ended no later than May 31, 2008 · Low confidence	Term ended	Term ended no later than May 31, 2008	Low confidence
US 5,107,226	Atomic frequency standard using optical pumping for state preparation and magnetic state selection of atoms Term ended Term ended no later than Apr 21, 2012 · Low confidence	Term ended	Term ended no later than Apr 21, 2012	Low confidence
US 5,160,901	Multimode crystal oscillator Term ended Term ended no later than Nov 3, 2012 · Low confidence	Term ended	Term ended no later than Nov 3, 2012	Low confidence
US 5,309,116	Multimode crystal oscillator Term ended Term ended no later than May 3, 2014 · Low confidence	Term ended	Term ended no later than May 3, 2014	Low confidence