Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5158729 | Process for producing a tube sheet | Elmar Hoff, Erich Schurmann | 1992-10-27 |
| 4984630 | Tube sheet for apparatus for transferring heat and/or mass, use thereof and process for its production | Elmar Hoff, Erich Schurmann | 1991-01-15 |
| 4932470 | Apparatus for transferring mass and/or heat | — | 1990-06-12 |
| 4867233 | Heat exchanger and method of making heat exchangers | — | 1989-09-19 |
| 4834930 | Method for the manufacture of apparatus for the transfer of heat and/or mass | — | 1989-05-30 |
| 4790372 | Heat exchanger having fusion bonded plastic tubes/support plate | Hugo P. Korstanje | 1988-12-13 |