Assignee
Inventors
- Robert C. Griffiths (2 patents)
- James H. Mabe (25 patents)
- Stefan R. Bieniawski (10 patents)
- Frederick T. Calkins (48 patents)
- Jonathan K. Brown (12 patents)
- Ordie Dean Butterfield (9 patents)
- Frank Bruce Irvine (1 patents)
US Patent 9677968 · Granted Jun 13, 2017