Granted Patent
Utility
US 6,553,938 · App. 09/848,649
Pet sheet
Inventors:
Takeshi Ikegami, Kengo Ochi
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: May 3, 2001
Inventors
Takeshi Ikegami
Kengo Ochi
Assignee (at issue)
Uni-Charm Petcare 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.