Granted Patent
Utility
US 4,643,080 · App. 06/748,021
Roof ridge ventilator system
Inventors:
John W. Trostle, James D. Klingensmith
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Jun 24, 1985
Inventors
John W. Trostle
James D. Klingensmith
Assignees (at issue)
Aluminum Company of America
John W. Trostle
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.