Granted Patent
Utility
US 4,323,116 · App. 06/104,512
Flow control apparatus
Inventor:
Charles J. Zimmerman
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Dec 17, 1979
Inventor
Charles J. Zimmerman
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.