Assignee
Inventors
- Donald P. Smith (44 patents)
- Michael J. Dobie (30 patents)
- Alden B. Sparman, Sr. (9 patents)
- John R. Norris (16 patents)
- Donald P. Lohr (1 patents)
- Gerald Easterling (4 patents)
- R. W. Taylor (1 patents)
US Patent 5210387 · Granted May 11, 1993