Issued Patents All Time
Showing 25 most recent of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5223325 | Filter medium | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1993-06-29 |
| 5066466 | Apparatus for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space | Heinz Holter, Heinrich Gresch, Heribert Dewert, Hanns Rump | 1991-11-19 |
| 5015451 | Process, filter and device for making available high-quality breathing air | Heinz Holter, Heinrich Gresch | 1991-05-14 |
| 4941824 | Method of and apparatus for cooling and cleaning the roof and environs of a coke oven | Heinz Holter, Heinrich Gresch | 1990-07-17 |
| 4936881 | Cooling tower for steam-powered plants | Sigurd Jorzyk, Gerhard Scholl, Heinz Holter, Heinrich Gresch, Heribert Dewert | 1990-06-26 |
| 4886000 | Method of treating waste | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1989-12-12 |
| 4885011 | Cooling tower for the cooling water that drains/ from the condensor of a steam generator or the condensors/ of a plurality of steam generators | Sigurd Jorzyk, Gerhard Scholl, Heinz Holter, Heinrich Gresch, Heribert Dewert | 1989-12-05 |
| 4882287 | Process for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space | Heinz Holter, Heinrich Gresch, Heribert Dewert, Hanns Rump | 1989-11-21 |
| 4875406 | Device for detecting different pollutants in gas streams | Heinz Holter, Heinrich Gresch, Heribert Dewert, Peter Burggraf | 1989-10-24 |
| 4802573 | Process for wet quenching of coke | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1989-02-07 |
| 4784810 | Smoke gas exhaust by way of a cooling tower | Sigurd Jorzyk, Gerhard Scholl, Heinz Holter, Heinrich Gresch, Heribert Dewert | 1988-11-15 |
| 4744289 | Cab for occupancy by individuals | Heinz Holter, Heinrich Gresch, Heribert Dewert, Joachim Tischendorf | 1988-05-17 |
| 4742763 | Device for the detection of noxious substances in the air supplied to a compartment occupied by people | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1988-05-10 |
| 4733605 | Process and device for purifying polluted air | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1988-03-29 |
| 4670234 | Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1987-06-02 |
| 4551304 | Method of cleaning air loaded with pollutants | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1985-11-05 |
| 4530817 | Apparatus for the protection of air fed to a labor-protection or vehicle compartment | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1985-07-23 |
| 4451435 | Apparatus for cleaning air loaded with pollutants | Heinz Holter, Heinrich Gresch, Heribert Dewert | 1984-05-29 |
| 4432776 | Process for filtering separators in dry chemisorption | Heinz Holter, Heinz Gresch | 1984-02-21 |
| 4388281 | Noxious-component removal from flue gas and compositions useful therefor | Heinz Holter, Heinz Gresch, Heribert Dewert | 1983-06-14 |
| 4366132 | Method of and apparatus for the chemisorptive scrubbing of waste gases | Heinz Holter, Heinz Gresch, Heribert Dewert, Berthold Dzikowski, Hans-Jurgen Twiehaus | 1982-12-28 |
| 4335708 | Solar collector | Heinz Holter, Heinz Gresch | 1982-06-22 |
| 4297117 | Respiratory device for catastrophic fires and/or smog weather conditions | Heinz Holter, Heinz Gresch | 1981-10-27 |
| 4295868 | Filter for cleaning hot gases | Heinz Holter, Heinz Gresch, Kurt Hubner, Ekkehard Weber | 1981-10-20 |
| 4270326 | Fireproof door for hotels, skyscrapers and the like | Heinz Holter, Heinz Gresch | 1981-06-02 |