Granted Patent
Utility
US 4,245,480 · App. 05/790,223
Refrigerant charge adjuster apparatus
Inventor:
James F. Saunders
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Apr 25, 1977
Inventor
James F. Saunders
Assignee (at issue)
The Trane 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.