Assignee
Inventors
- John D. Margerum (5 patents)
- Anna M. Lackner (11 patents)
- Elena Ramos (3 patents)
- George W. Smith (11 patents)
- Nuno A. Vaz (13 patents)
- James L. Kohler (7 patents)
- Charles R. Allison (4 patents)
US Patent 4938568 · Granted Jul 3, 1990