Patents by Inventor Lawrence E. Demmert

Lawrence E. Demmert 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).

  • Seine-hauling power blocks
    Patent number: 3964730
    Abstract: A power block is mounted above the deck of a trawler for hauling in seine to be piled on the deck. Rollers mounted on the power block are engageable by a seine looped over the sheave of the power block to increase the arc of wrap of a seine draped over the block sheave for increasing the traction of the sheave on the seine.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: June 22, 1976
    Inventor: Lawrence E. Demmert