Granted Patent
Utility
US 6,719,418 · App. 10/201,905
Underpressure regulating mechanism for inkjet pens
Inventors:
Ching-Yu Chou, Wen-Chung Chen, Chien-Ming Lin, Chuang-Hsien Chiu
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Jul 25, 2002
Inventors
Ching-Yu Chou
Wen-Chung Chen
Chien-Ming Lin
Chuang-Hsien Chiu
Assignee (at issue)
Nanodynamics, Inc.
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.