Granted Patent
Utility
US 4,537,280 · App. 06/592,818
Exhaust extension pipe replacement kit
Inventor:
Peter R. Roberts
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Mar 23, 1984
Inventor
Peter R. Roberts
Assignee (at issue)
Thrush Co., 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.