Granted Patent
Utility
US 4,924,631 · App. 07/267,853
Pultruded window frame with rigid corner insert
Inventors:
Lawrence Davies, Kenneth S. Church
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Nov 7, 1988
Inventors
Lawrence Davies
Kenneth S. Church
Assignee (at issue)
Omniglass Ltd.
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.