Granted Patent
Utility
US 4,313,294 · App. 06/186,353
Constant float attachment apparatus
Inventor:
Wayne B. Martenas
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Sep 11, 1980
Inventor
Wayne B. Martenas
Assignee (at issue)
Sperry Corp.
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.