Granted Patent
Utility
US 5,215,503 · App. 07/891,898
Molded plastic shaft extension for double insulated apparatus
Inventors:
Jeffrey E. Krouse, Gary M. Marcy, David B. Finkenbinder
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Jun 1, 1992
Inventors
Jeffrey E. Krouse
Gary M. Marcy
David B. Finkenbinder
Assignee (at issue)
Federal Signal Corporation
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.