Granted Patent
Utility
US 5,284,445 · App. 08/000,670
Portable drawing surface with interchangeable components
Inventors:
Charles W. Dietterich, Richard A. Tarozzi
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Jan 5, 1993
Inventors
Charles W. Dietterich
Richard A. Tarozzi
Assignee (at issue)
BINNEY & SMITH 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.