Granted Patent
Utility
US 4,642,837 · App. 06/767,559
Broom having interlocking components
Inventors:
Charles E. Nichols, John R. Howard
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Aug 20, 1985
Inventors
Charles E. Nichols
John R. Howard
Assignee (at issue)
The Drackett Company
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.