Granted Patent
Utility
US 5,230,180 · App. 07/863,103
Door having hidden screw construction
Inventors:
Robert C. Tweedt, Brad E. Pingel
Patented Case
View Patent ↗
Granted: Jul 27, 1993
Filed: Apr 3, 1992
Inventors
Robert C. Tweedt
Brad E. Pingel
Assignee (at issue)
EMCO Enterprises, 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.