Granted Patent
Utility
US 6,674,021 · App. 09/959,182
Combination weighing equipment with sealed happer door driving mechanisms to facilitate cleaning
Inventors:
Osamu Tanaka, Nobuyuki Wakabayashi
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Oct 18, 2001
Inventors
Osamu Tanaka
Nobuyuki Wakabayashi
Assignee (at issue)
ANRITSU CORPORATION
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.