Dreyer; Heinz
Patent Applications and Registrations
Patent applications and USPTO patent grants for Dreyer; Heinz.The latest application filed is for "preparation of a catalytically active composition for the gas phase oxidation of propylene to acrolein and acrylic acid".
- Dreyer; Heinz - Ludwigshafen DE
- Dreyer; Heinz - Hasbergen DE
- Dreyer; Heinz - Hasbergen-Gaste DE
- Dreyer; Heinz - Gaste DT
- Dreyer; Heinz - Devese DT
| Patent | Date |
|---|---|
| Preparation of a catalytically active composition for the gas phase oxidation of propylene to acrolein and acrylic acid Grant 4,916,103 - Martan , et al. April 10, 1 | 1990-04-10 |
| Preparation of medicinal white oils and medicinal paraffins Grant 4,786,402 - Anstock , et al. November 22, 1 | 1988-11-22 |
| Seed drill Grant 4,726,304 - Dreyer , et al. February 23, 1 | 1988-02-23 |
| Seed drill Grant 4,694,759 - Dreyer , et al. September 22, 1 | 1987-09-22 |
| Drill for applying seed and fertilizer Grant 4,580,507 - Dreyer , et al. April 8, 1 | 1986-04-08 |
| Seed drill with disk-type furrow openers Grant 4,422,392 - Dreyer , et al. December 27, 1 | 1983-12-27 |
| Seed drill Grant 4,366,760 - Dreyer January 4, 1 | 1983-01-04 |
| Seed drill mounting arrangement Grant 4,275,670 - Dreyer June 30, 1 | 1981-06-30 |
| Seed and fertilizer drill drive Grant 4,263,858 - Dreyer April 28, 1 | 1981-04-28 |
| Seed drill having parallel guide means for the movable shank Grant 4,208,974 - Dreyer , et al. June 24, 1 | 1980-06-24 |
| Attaching device for mounting of a broadcast fertilizer spreader on a tractor Grant 4,058,180 - Dreyer November 15, 1 | 1977-11-15 |
| Machine for the pneumatic spreading of granular material Grant 4,020,991 - Dreyer May 3, 1 | 1977-05-03 |
| Surface-measuring Device Grant 3,580,062 - Perthen , et al. May 25, 1 | 1971-05-25 |
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