Granted Patent
Utility
US 4,411,939 · App. 06/210,794
Conformable reinforcement board
Inventors:
Robert D. Hawkins, James A. Hawkins
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Nov 26, 1980
Inventors
Robert D. Hawkins
James A. Hawkins
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.