Granted Patent
Utility
US 4,226,447 · App. 05/647,759
Swivel apparatus
Inventor:
Cicero C. Brown, deceased
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Jan 9, 1976
Inventor
Cicero C. Brown, deceased
Assignee (at issue)
Brown Oil Tools, 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.