Granted Patent
Utility
US 4,890,418 · App. 07/220,322
Access panel assembly with door and multi-functional frame
Inventor:
Steve H. Sachs
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Jul 18, 1988
Inventor
Steve H. Sachs
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.