Granted Patent
Utility
US 4,216,411 · App. 05/931,872
Underwater light assembly with low-water cut-off
Inventors:
Gordon F. Ehret, William N. Rowley, Hermenegildo A. Espiritu
Patented Case
View Patent ↗
Granted: Aug 5, 1980
Filed: Aug 8, 1978
Inventors
Gordon F. Ehret
William N. Rowley
Hermenegildo A. Espiritu
Assignee (at issue)
Wylain, 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.