Granted Patent
Utility
US 4,291,701 · App. 05/923,600
Pressure transducing and methods and apparatus for filling a cavity
Inventor:
Ronald R. Bowman
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Jul 11, 1978
Inventor
Ronald R. Bowman
Assignee (at issue)
Bell and Howell, LLC
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.