Granted Patent
Utility
US 4,357,672 · App. 06/173,723
Distance ranging apparatus and method
Inventors:
Joseph A. Howells, Seymour J. Sindeband
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Jul 30, 1980
Inventors
Joseph A. Howells
Seymour J. Sindeband
Assignee (at issue)
Science Accessories Corp.
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.