Granted Patent
Utility
US 6,575,477 · App. 09/827,401
Quick change true length collet chuck assembly
Inventors:
James A. Humphrey, Donald W. Ferris
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Apr 6, 2001
Inventors
James A. Humphrey
Donald W. Ferris
Assignee (at issue)
Advanced Tool Systems, 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.