Granted Patent
Utility
US 4,527,740 · App. 06/450,273
Hose-end aspirator sprayer
Inventors:
Rudolph M. Gunzel, Jr., William J. Wichman, Roy K. Fujitaki
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Dec 16, 1982
Inventors
Rudolph M. Gunzel, Jr.
William J. Wichman
Roy K. Fujitaki
Assignee (at issue)
Chevron Research 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.