Inventor: van der Velden, Sjef
Inventor: van der Velden, Sjef
Inventor: Jamieson, Richard
Inventor: Fulcher, Richard John
Inventor: Lambert, Harold
Inventor: Craigie, John Maxwell
Inventor: Tidmore, Ronald D.
Inventor: Atchison, James K
Inventor: McElrea, Laurence E.
Inventor: Craigie, John Maxwell, Craigie, Gail Alexis