Granted Patent
Utility
US 4,699,178 · App. 06/939,232
Low volumetric expansion hose
Inventors:
Donald E. Washkewicz, Harold Belofsky
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Dec 8, 1986
Inventors
Donald E. Washkewicz
Harold Belofsky
Assignee (at issue)
Parker-Hannifin 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.