Granted Patent
Utility
US 4,886,850 · App. 07/238,673
Rubber compositions and pneumatic tires using the same
Inventors:
Masaki Ogawa, Yasuro Shiomura, Toshiki Takizawa
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Aug 31, 1988
Inventors
Masaki Ogawa
Yasuro Shiomura
Toshiki Takizawa
Assignee (at issue)
BRIDGESTONE 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.