Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5150928 | Coupling sleeve for connection of a branch pipe to a main pipe | Berend Jan Van Dijk, Adriaan Paulen, Albertus A. Oostenbrink | 1992-09-29 |
| 5076542 | Ball-cock | Jan Ottens | 1991-12-31 |
| 4929408 | Method of locating an electrical conductor between a first extruded tube and an extruded lining | Hendrik Severiens, Jan A. van Houten, Berend Jan Van Dijk | 1990-05-29 |
| 4743123 | Plastic bag and closed plastic bag with laser-formed venting perforations | Heinrich Legters | 1988-05-10 |
| 4634844 | Electroweldable socket and a device of manufacturing such a socket | Hans Overeijnder, Jan P. van Dongeren | 1987-01-06 |
| 4572523 | Sealing joint and retaining ring for pipe grooved bell and straight spigot joint | Ali Guettouche | 1986-02-25 |
| 4362323 | Pipe part with a socket end | Jan P. van Dongeren, Gerard A. E. Blok | 1982-12-07 |
| 4287854 | Cage construction for use in breeding fur-bearing animals | Finn Hansen | 1981-09-08 |