Granted Patent
Utility
US 4,522,191 · App. 06/569,918
Non-pull apart telescoping roof jack assembly for furnace
Inventors:
Joe Knowles, Mellie E. Winters
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Jan 11, 1984
Inventors
Joe Knowles
Mellie E. Winters
Assignee (at issue)
The Coleman Company, 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.