Granted Patent
Utility
US 4,907,208 · App. 07/279,044
Sonar transducer assembly for fishing boats
Inventors:
Darrell J. Lowrance, Roy E. Stiner, Phil Williams
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Dec 2, 1988
Inventors
Darrell J. Lowrance
Roy E. Stiner
Phil Williams
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.