Granted Patent
Utility
US 4,034,843 · App. 05/575,819
Split correction ribbon and method
Inventors:
Douglas A. Newman, Albert E. Brown, Allan T. Schlotzhauer
Patented Case
View Patent ↗
Granted: Jul 12, 1977
Filed: May 8, 1975
Inventors
Douglas A. Newman
Albert E. Brown
Allan T. Schlotzhauer
Assignee (at issue)
Columbia Ribbon & Carbon Mfg. Co., Inc.
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.