Assignee
No assignee recorded.
Inventors
- Richard L. Grace (15 patents)
- Alberto M. Guzman (8 patents)
- Marc A. Portnoff (8 patents)
- David A. Purta (12 patents)
- Unknown
- John G. Tabacchi (2 patents)
US Patent 4847783 · Granted Jul 11, 1989
No assignee recorded.