Granted Patent
Utility
US 5,081,731 · App. 07/522,975
Method of continuous changing dye-color in spray dyeing
Inventors:
Yoshimichi Yamakita, Mitsugu Umino
Patented Case
View Patent ↗
Granted: Jan 21, 1992
Filed: May 14, 1990
Inventors
Yoshimichi Yamakita
Mitsugu Umino
Assignee (at issue)
Yoshida Kogyo K.K.
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.