Granted Patent
Utility
US 4,537,071 · App. 06/554,317
Retriever tool
Inventor:
David K. Waterman
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Nov 23, 1983
Inventor
David K. Waterman
Assignee (at issue)
Rohrback Corporation
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.