Granted Patent
Utility
US 4,297,712 · App. 06/076,093
Air flow tunnel for reducing ink jet drag on array head
Inventors:
Gerald B. Lammers, Gordon James Smith
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Sep 17, 1979
Inventors
Gerald B. Lammers
Gordon James Smith
Assignee (at issue)
International Business Machines 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.