Granted Patent
Utility
US 4,505,814 · App. 06/486,072
Adjustably extensible roof drain receptacle
Inventor:
Marshall W. Marshall
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Apr 18, 1983
Inventor
Marshall W. Marshall
Assignee (at issue)
Tyler Pipe 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.