Granted Patent
Utility
US 6,320,293 · App. 09/538,268
Electric motor having brushes and commutator of armature
Inventors:
Takahiro Yamada, Toshiyasu Ishizuka, Hisashi Masui, Akihiro Suzuki, Kazushi Sugishima
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Mar 30, 2000
Inventors
Takahiro Yamada
Toshiyasu Ishizuka
Hisashi Masui
Akihiro Suzuki
Kazushi Sugishima
Assignee (at issue)
ASMO CO., LTD.
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.