Granted Patent
Utility
US 4,594,039 · App. 06/262,692
Fastener
Inventor:
Erwin C. Witte
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: May 11, 1981
Inventor
Erwin C. Witte
Assignee (at issue)
Microdot 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.