Granted Patent
Utility
US 5,048,848 · App. 07/057,056
In-line roller skate with axle aperture plugs for simplified wheel installation
Inventors:
Brennan J. Olson, Thomas J. Brace
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: Jun 12, 1987
Inventors
Brennan J. Olson
Thomas J. Brace
Assignee (at issue)
Rollerblade, 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.