Granted Patent
Utility
US 4,303,928 · App. 06/082,885
Printer head assembly for an ink jet system printer of the charge amplitude controlling type
Inventors:
Kiyoshi Sugiyama, Masaharu Matsuba, Fusao Iwagami, Khoki Fukumoto
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Oct 9, 1979
Inventors
Kiyoshi Sugiyama
Masaharu Matsuba
Fusao Iwagami
Khoki Fukumoto
Assignees (at issue)
Nippon Telegraph and Telephone Public Corporation
SHARP KABUSHIKI KAISHA
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.