Granted Patent
Utility
US 4,978,484 · App. 07/331,624
Method of and apparatus for manufacturing biaxially oriented film
Inventors:
Masao Takashige, Teruyuki Iwai, Hidenobu Takeichi, Yasuo Takai, Yoshinori Sasaki, Masato Masuoka, Yuichi Ohki
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Mar 30, 1989
Inventors
Masao Takashige
Teruyuki Iwai
Hidenobu Takeichi
Yasuo Takai
Yoshinori Sasaki
Masato Masuoka
Yuichi Ohki
Assignee (at issue)
Idemitsu Petrochemical 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.