Granted Patent
Utility
US 4,553,303 · App. 06/581,838
Removal tool for tangless, helically coiled insert
Inventor:
Albert K. Yamamoto
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Feb 21, 1984
Inventor
Albert K. Yamamoto
Assignee (at issue)
REXNORD GMBH
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.