Patents by Inventor David J. May

David J. May 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).

  • Patent number: 11674781
    Abstract: The invention relates to bullets having increased frangibility (or which can be easily fragmented) and to powder materials and processes for the manufacture of such bullets. The bullets of the present invention are made from an iron alloy containing 75-81% Hoeganaes MH-100 Iron 0.6-0.09% Carbon, and balance of admixed Copper powder. Said bullets are then coated for lubricity so the bullet does not prematurely wear the barrel of a gun. Additionally, the invention provides a simple low cost process to make bullets that is amenable to mass production via automation.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: June 13, 2023
    Assignee: TPI Powder Metallurgy, Inc.
    Inventors: Stuart Yntema, Steven B. Yntema, Ted R. Easlick, David J. May
  • Patent number: 5117847
    Abstract: A unitary transparent housing includes a clipper assembly mounted interiorly thereof aligned with a front wall opening of the housing. A cam and associated cam actuator leg is operative through a projecting actuator rod, whereupon projection of the rod interiorly of the housing effects cooperation of a fixed and movable cutter blade. An underlying tray is reciprocably and removably mounted relative to the housing to accumulate and permit ease of disposal of fingernail clippings. A modification of the invention includes a basin tray mounting as brush and abrasive sheet to enhance ease of manicuring, and further the basin tray may be provided with a fluid supply to permit directing fluid onto an individual's fingernail to assist in cleaning of the fingernail during a manicure procedure.
    Type: Grant
    Filed: August 6, 1991
    Date of Patent: June 2, 1992
    Inventor: David J. May