Assignee
Inventors
- Robert Francis Berry (46 patents)
- John Day Howard (8 patents)
- Unknown
- Frank Eliot Levine (188 patents)
- Donald Mulvey (7 patents)
- Enio Manuel Pineda (25 patents)
- Robert John Urquhart (108 patents)
US Patent 6728955 · Granted Apr 27, 2004