Granted Patent
Utility
US 5,656,939 · App. 08/452,599
Apparatus for measuring hardness of ultraviolet curing transformation agent comprising stain and method for the same
Inventors:
Izumi Serizawa, Masahiro Kurano, Yasusuke Takahashi
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: May 25, 1995
Inventors
Izumi Serizawa
Masahiro Kurano
Yasusuke Takahashi
Assignee (at issue)
ORC MANUFACTURING 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.