Granted Patent
Utility
US 4,271,701 · App. 05/886,741
Gas flow measuring system
Inventors:
Philip T. Dempster, John Yenkai Pun
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: Mar 15, 1978
Inventors
Philip T. Dempster
John Yenkai Pun
Assignee (at issue)
Cavitron, 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.