Granted Patent
Utility
US 4,988,437 · App. 07/423,963
In-line leaf trap
Inventors:
Alexander A. Gefter, Kenneth N. Marshall
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Oct 19, 1989
Inventors
Alexander A. Gefter
Kenneth N. Marshall
Assignee (at issue)
Arneson Products, 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.