Granted Patent
Utility
US 4,134,452 · App. 05/833,183
Well testing tool
Inventor:
George F. Kingelin
Patented Case
View Patent ↗
Granted: Jan 16, 1979
Filed: Sep 14, 1977
Inventor
George F. Kingelin
Assignee (at issue)
Gulf Research & Development Company
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.