Granted Patent
Utility
US 4,607,974 · App. 06/583,671
Wand and wand extension
Inventors:
Michael V. Brothers, Bruce W. Schaeffer
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: Feb 27, 1984
Inventors
Michael V. Brothers
Bruce W. Schaeffer
Assignee (at issue)
Cooper Industries Holdings
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.