Granted Patent
Utility
US 4,471,698 · App. 06/352,489
Mass-spring rainhead
Inventors:
Richard W. Rentfrow, Edwin M. Stryker
Patented Case
View Patent ↗
Granted: Sep 18, 1984
Filed: Feb 25, 1982
Inventors
Richard W. Rentfrow
Edwin M. Stryker
Assignee (at issue)
Honeywell Limited
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.