Granted Patent
Utility
US 4,839,618 · App. 07/053,658
Monolithic crystal filter with wide bandwidth and method of making same
Inventors:
Gerald E. Roberts, A. Gordon Staples, Samuel Toliver
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: May 26, 1987
Inventors
Gerald E. Roberts
A. Gordon Staples
Samuel Toliver
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.