Granted Patent
Utility
US 4,238,524 · App. 05/883,768
Process for identification marking clear plastic articles
Inventors:
Norman U. Laliberte, Don H. Rotenberg
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Mar 6, 1978
Inventors
Norman U. Laliberte
Don H. Rotenberg
Assignee (at issue)
American Optical 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.