Granted Patent
Utility
US 5,240,596 · App. 07/743,246
Aquarium cleaning apparatus
Inventor:
M. Gaines Chesnut
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Aug 9, 1991
Inventor
M. Gaines Chesnut
Assignee (at issue)
Chesco, 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.