Assignee
Inventors
- David W. Dranchak (19 patents)
- David E. Engle (7 patents)
- David Hessian (1 patents)
- Alan D. Knight (11 patents)
- Wai Mon Ma (20 patents)
- Thomas G. Macek (16 patents)
- John J. Squires (12 patents)
US Patent 4907975 · Granted Mar 13, 1990