Granted Patent
Utility
US 4,411,455 · App. 06/173,987
Riser connector
Inventor:
Mark A. Schnatzmeyer
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Jul 31, 1980
Inventor
Mark A. Schnatzmeyer
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.