Granted Patent
Utility
US 5,345,618 · App. 07/762,344
Vacuum toilet system
Inventors:
James A. Sigler, Richard W. Sprang, Edward McKiernan, Ronald J. Bailey
Patented Case
View Patent ↗
Granted: Sep 13, 1994
Filed: Sep 19, 1991
Inventors
James A. Sigler
Richard W. Sprang
Edward McKiernan
Ronald J. Bailey
Assignee (at issue)
BellandTechnology AG
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.