Granted Patent
Utility
US 4,753,091 · App. 07/048,411
Pivoting tumbler system
Inventor:
Timothy B. Sheets
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: May 11, 1987
Inventor
Timothy B. Sheets
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.