Assignee
Inventors
- Richard C. Beaven (1 patents)
- Michael B. Evans (11 patents)
- Tryggve Fossum (42 patents)
- Ricky C. Hetherington (60 patents)
- William R. Grundmann (9 patents)
- John E. Murray (15 patents)
- Ronald M. Salett (17 patents)
US Patent 4982402 · Granted Jan 1, 1991