Granted Patent
Utility
US 4,964,426 · App. 07/250,690
Tobacco smoke filters and process for production thereof
Inventors:
Benedict M. Lee, James E. Harris
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Sep 28, 1988
Inventors
Benedict M. Lee
James E. Harris
Assignee (at issue)
EASTMAN KODAK COMPANY
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.