Granted Patent
Utility
US 4,674,960 · App. 06/749,053
Sealed rotary compressor
Inventors:
Joseph F. Rando, Dale E. Koop
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Jun 25, 1985
Inventors
Joseph F. Rando
Dale E. Koop
Assignee (at issue)
Spectra-Physics, 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.