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Heinz Dreyer

AM Amazon: 14 patents #957 of 19,158Top 5%
Basf Se: 3 patents #4,656 of 13,826Top 35%
Overall (All Time): #280,549 of 4,157,543Top 7%
17
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5736076 Graphite moldings Ruprecht Meissner, Matthias Irgang, Knut Eger, Peter Weidlich 1998-04-07
4916103 Preparation of a catalytically active composition for the gas phase oxidation of propylene to acrolein and acrylic acid Hans Martan, Matthias Schwarzmann, Karl-Heinz Boehning 1990-04-10
4786402 Preparation of medicinal white oils and medicinal paraffins Thomas Anstock, Walter Himmel, Matthias Schwarzmann, Ulrich Lebert, Ansgar Eisenbeis 1988-11-22
4726304 Seed drill Benno Wiemeyer 1988-02-23
4694759 Seed drill Bernd Scheufler, Benno Wiemeyer, Johannes Luhrmann 1987-09-22
4580507 Drill for applying seed and fertilizer Benno Wiemeyer 1986-04-08
4580508 Seed drill 1986-04-08
4480948 Machine for applying pellets and powder 1984-11-06
4422392 Seed drill with disk-type furrow openers Benno Wiemeyer 1983-12-27
4407207 Drill having disk furrow openers 1983-10-04
4366760 Seed drill 1983-01-04
4351481 Centrifugal spreader, especially for granulated fertilizers 1982-09-28
4275670 Seed drill mounting arrangement 1981-06-30
4263858 Seed and fertilizer drill drive 1981-04-28
4234129 Mounting device for agricultural spreading machines 1980-11-18
4208974 Seed drill having parallel guide means for the movable shank Benno Wiemeyer 1980-06-24
4202474 Machine for spreading fertilizer and seed 1980-05-13