Assignee
Inventors
- Richard W. Martin (23 patents)
- John L. Fisher (16 patents)
- William R. Fortenberry (3 patents)
- Randall L. Schlake (6 patents)
- Ronald F. Dornbrock (4 patents)
- James D. Richerson (7 patents)
- Kenneth E. Marrett, Sr. (2 patents)
US Patent 4875277 · Granted Oct 24, 1989