Assignee
Inventors
- R. Michael Phillippi (9 patents)
- David C. Greenspan (31 patents)
- Richard Theodore Ellis (11 patents)
- Tadeusz M. Drzewiecki (28 patents)
- Unknown
- Ernie Tokay (3 patents)
- James R. Bush (2 patents)
US Patent 4746534 · Granted May 24, 1988