Patents by Inventor Jan Michalko

Jan Michalko 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).

  • Injection plow
    Patent number: 4337712
    Abstract: A fertilizer injection plow for underground fertilization by paste or liquid fertilizer. The plow, which is adapted for being mounted on a vehicle such as a tractor, carries one or more plowshares which are adjustable as to their depth of penetration into the soil. A fertilizer-containing drum is mounted on the plow for rotation by ground engagement as the plow travels. A fertilizer injection pump, driven by rotation of the drum, forces fertilizer to one or more nozzles disposed rearwardly of the plowshares.
    Type: Grant
    Filed: August 6, 1980
    Date of Patent: July 6, 1982
    Assignee: Jednotne reolnicke druzstvo
    Inventor: Jan Michalko