Assignee
Inventors
- Eric A. Barringer (19 patents)
- Sheldon Lieberman (9 patents)
- Mark S. Schmidt (2 patents)
- James D. Hodge (23 patents)
- Richard Waack (1 patents)
- Donald J. Kelley (1 patents)
- Brian W. Saxton (1 patents)
- William C. Gruber (2 patents)
US Patent 4861646 · Granted Aug 29, 1989