Granted Patent
Utility
US 5,199,377 · App. 07/873,650
Artificial reefs manufactured from coal combustion by-products
Inventors:
William H. Gehrmann, III, Charles Anderson, Sammy M. Ray, William Brent Baker
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Apr 23, 1992
Inventors
William H. Gehrmann, III
Charles Anderson
Sammy M. Ray
William Brent Baker
Assignee (at issue)
JTM Industries, 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.