Patents by Inventor Tzvi Gruenewald

Tzvi Gruenewald has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Seed planting unit
    Patent number: 3945330
    Abstract: A seed planting unit carries a seed planter that dispenses a predetermined amount of seed into the ground at predetermined intervals in response to the coupling between a ground engaging wheel supporting the unit and the drive means of the seed planter. A film dispenser is also carried by the unit for laying film on the ground over the planted seeds; and a transmission is provided for synchronizing the perforating of the film before it is laid with the dispensing of the seeds by the seed planter so that the apertures in the film are aligned with the seeds deposited in the ground.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: March 23, 1976
    Assignee: The State of Israel Ministry of Agriculture
    Inventors: Chaim Leavitt, Yekutiel Alper, Tzvi Gruenewald