Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5514456 | Spiral link belt with low permeability to air and method for its production | — | 1996-05-07 |
| 5183442 | Double helix, method of making same and spiral link belt made therefrom | — | 1993-02-02 |
| 4796749 | Spiral link belt with composite helices | — | 1989-01-10 |
| 4696852 | Spiral link belt of reduced air permeability and method of producing same | — | 1987-09-29 |
| 4650709 | Helix structures for use in forming helix belts | — | 1987-03-17 |
| 4575472 | Double helix, spiral belts made therefrom | — | 1986-03-11 |
| 4564992 | Method for producing helix structures for use in forming helix belts | — | 1986-01-21 |
| 4451957 | Apparatus for joining the ends of a belt to make it endless | Roelof Roelofs | 1984-06-05 |
| 4392902 | Method for producing a sieve belt of thermosettable synthetic resin helices for a papermaking machine | — | 1983-07-12 |
| 4362776 | Sieve belt with filler material | Roelof Roelofs | 1982-12-07 |
| 4346138 | Sieve belt of thermosettable synthetic resin helices for papermaking machine | — | 1982-08-24 |