Granted Patent
Utility
US 4,603,523 · App. 06/622,481
Underfloor access housing
Inventors:
Raymond E. Albrecht, Paul Haskins
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Jun 20, 1984
Inventors
Raymond E. Albrecht
Paul Haskins
Assignee (at issue)
H. H. Robertson 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.