Granted Patent
Utility
US 4,369,508 · App. 06/207,937
Sonar having signal amplitude differentiation and noise suppression
Inventor:
Ronald G. Weber
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Nov 18, 1980
Inventor
Ronald G. Weber
Assignee (at issue)
Lowrance Electronics, Inc.
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.