Assignee
Inventors
- Joseph F. Engelberger (6 patents)
- Torsten H. Lindbom (12 patents)
- Maurice J. Dunne (6 patents)
- William Perzley (8 patents)
- Wilbur N. Roberts (5 patents)
- Horace L. Gardener, deceased (1 patents)
US Patent RE32794 · Granted Dec 6, 1988