Assignee
Inventors
- Unknown
- Unknown
- Gary Knopeck (44 patents)
- Robert Parker (36 patents)
- Unknown
- Stephen Yates (71 patents)
- George D. Green (63 patents)
- Unknown
- Willis Hammond (9 patents)
- Raymond H. Thomas (58 patents)
US Patent 5137929 · Granted Aug 11, 1992