Granted Patent
Utility
US 4,512,048 · App. 06/517,684
Van sofa bed
Inventors:
Robert O. Isham, Wayne S. Reese
Patented Case
View Patent ↗
Granted: Apr 23, 1985
Filed: Jul 27, 1983
Inventors
Robert O. Isham
Wayne S. Reese
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.