Granted Patent
Utility
US 4,490,800 · App. 06/330,297
Dual head gauger apparatus with automatic adjustment for pressure variation
Inventor:
Whitney S. Powers
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Dec 14, 1981
Inventor
Whitney S. Powers
Assignee (at issue)
Powers Manufacturing, 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.