Assignee
Inventors
- Clifford Ward (5 patents)
- Eugene Chao (1 patents)
- Roy E. Booth (7 patents)
- Frank H. Turrill (5 patents)
- Robert H. Wombles (14 patents)
- John W. Newman (61 patents)
- William P. Hettinger, Jr. (69 patents)
US Patent 4927620 · Granted May 22, 1990