Granted Patent
Utility
US 4,239,186 · App. 06/031,233
Trip valve construction
Inventor:
Prem Pratap
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Apr 18, 1979
Inventor
Prem Pratap
Assignee (at issue)
CARRIER CORPORATION
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.