Granted Patent
Utility
US 4,031,638 · App. 05/716,103
Steam iron water gauge
Inventors:
William D. Ryckman, Jr., Lester D. Little
Patented Case
View Patent ↗
Granted: Jun 28, 1977
Filed: Aug 20, 1976
Inventors
William D. Ryckman, Jr.
Lester D. Little
Assignee (at issue)
General Electric 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.