Granted Patent
Utility
US 5,620,136 · App. 08/547,324
Foam-filled plastic mailbox post
Inventors:
Ronald D. Erwin, Marvin Ray Whitley
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Oct 24, 1995
Inventors
Ronald D. Erwin
Marvin Ray Whitley
Assignee (at issue)
Erwin Industries, 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.