Granted Patent
Utility
US 4,676,993 · App. 06/851,910
Method and apparatus for selectively fine-tuning a coupled-dual resonator crystal and crystal manufactured thereby
Inventors:
Gerald E. Roberts, Samuel Toliver, Robert J. Crescenzi
Patented Case
View Patent ↗
Granted: Jun 30, 1987
Filed: Apr 11, 1986
Inventors
Gerald E. Roberts
Samuel Toliver
Robert J. Crescenzi
Assignee (at issue)
General Electric Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.