Assignee
Inventors
- Francis E. Tisdell (17 patents)
- Peter L. Johnson (19 patents)
- James T. Pechacek (8 patents)
- Robert G. Suhr (15 patents)
- Donald H. DeVries (17 patents)
- Carl Penman Denny (6 patents)
- Mary L. Ash (9 patents)
US Patent 6413997 · Granted Jul 2, 2002