Granted Patent
Utility
US 4,728,568 · App. 06/920,784
Masking tape for use in manufacturing a printed board
Inventors:
Shigeru Sasada, Tetsuo Ohwada, Masaru Mishima
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Oct 20, 1986
Inventors
Shigeru Sasada
Tetsuo Ohwada
Masaru Mishima
Assignees (at issue)
DAINIPPON SCREEN MFG. CO., LTD.
Sanyo Kokusaku Pulp 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.