Assignee
No assignee recorded.
Inventors
- Eduard C. Beuvery (4 patents)
- Unknown
- Jan Poolman (56 patents)
- Jacobus Hubertus Van Boom (8 patents)
- Peter Hoogerhout (6 patents)
- Constant Adriaan Anton Van Boeckel (31 patents)
US Patent 5034519 · Granted Jul 23, 1991
No assignee recorded.