Granted Patent
Utility
US 4,462,068 · App. 06/391,666
Luminaire with improved lens structure
Inventor:
Jan Shadwick
Patented Case
View Patent ↗
Granted: Jul 24, 1984
Filed: Jun 24, 1982
Inventor
Jan Shadwick
Assignee (at issue)
Manville Service 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.