Granted Patent
Utility
US 4,152,981 · App. 05/803,322
Dual pitch impact printing mechanism and method
Inventors:
Anthony P. Sapino, Donald S. Swatik, Robert E. Costello, Vahe H. Malakian, Kenneth Staugaard
Patented Case
View Patent ↗
Granted: May 8, 1979
Filed: Jun 3, 1977
Inventors
Anthony P. Sapino
Donald S. Swatik
Robert E. Costello
Vahe H. Malakian
Kenneth Staugaard
Assignee (at issue)
Computer Peripherals 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.