Granted Patent
Utility
US 6,446,647 · App. 09/597,744
Cassette holder for cleaning equipment
Inventors:
Eric Chu, Hung-Hsien Chang, To Hsu, Chin-Wen Chung, Hsing-Sheng Yang
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Jun 19, 2000
Inventors
Eric Chu
Hung-Hsien Chang
To Hsu
Chin-Wen Chung
Hsing-Sheng Yang
Assignee (at issue)
WINBOND ELECTRONICS CORP.
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.