Assignee
No assignee recorded.
Inventors
- Leslie R. Hatton (18 patents)
- Ian G. Buntain (9 patents)
- David William Hawkins (27 patents)
- Edgar W. Parnell (17 patents)
- Christopher J. Pearson (9 patents)
- David A. Roberts (19 patents)
US Patent 5232940 · Granted Aug 3, 1993
No assignee recorded.