Granted Patent
Utility
US 6,349,728 · App. 09/563,297
Portable cigarette smoking apparatus
Inventor:
Xuan M. Pham
Patented Case
View Patent ↗
Granted: Feb 26, 2002
Filed: May 3, 2000
Inventor
Xuan M. Pham
Assignee (at issue)
Philip Morris 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.