Granted Patent
Utility
US 6,183,344 · App. 09/454,529
Method for grinding glass funnel seal edge and apparatus therefor
Inventors:
Yoshihiro Tsuchimoto, Shinji Tanaka, Shigeru Muramoto
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Dec 6, 1999
Inventors
Yoshihiro Tsuchimoto
Shinji Tanaka
Shigeru Muramoto
Assignee (at issue)
ASAHI GLASS 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.