Patents by Inventor David ENGLEFIELD

David ENGLEFIELD 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: 12685914
    Abstract: An aiming key for enhancing the accuracy of aiming while putting a golf ball is provided that includes a body having a pair of parallel sides. Each side has a first terminus and a second terminus and a first end extends between the first terminus of each side. Moreover, the body includes an arcuate second end extending between the second terminus of each side, a circular target proximate the second arcuate end, an interior opening including a first interior end and a second interior end. Furthermore, the body includes an aiming member aimed at a center of the target. The aiming member includes a first aiming member side, a second aiming member side, an aiming member end and an elongated cut-out intermediate the first and second aiming member sides. The cut-out and the aiming member sides are parallel to the parallel sides and the cut-out extends through the body.
    Type: Grant
    Filed: October 3, 2025
    Date of Patent: July 21, 2026
    Assignee: Putter Key, LLC
    Inventors: Lawrence Alioto, David Englefield
  • Patent number: 12582888
    Abstract: An attachment tool for attaching an aiming device to a putter head is provided that includes a body. The body includes a flat face, a first side, and a second side. Moreover, the apparatus includes a pair of parallel arms integrally formed with the body that orthogonally extend away from the flat face of the body. The arms are separated by a distance, each arm includes a channel, and the channels face each other.
    Type: Grant
    Filed: June 30, 2025
    Date of Patent: March 24, 2026
    Assignee: Putter Key, LLC
    Inventors: David Englefield, Lawrence Alioto, Matthew Alioto
  • Publication number: 20260027440
    Abstract: An aiming key for enhancing the accuracy of aiming while putting a golf ball is provided that includes a body having a pair of parallel sides. Each side has a first terminus and a second terminus and a first end extends between the first terminus of each side. Moreover, the body includes an arcuate second end extending between the second terminus of each side, a circular target proximate the second arcuate end, an interior opening including a first interior end and a second interior end. Furthermore, the body includes an aiming member aimed at a center of the target. The aiming member includes a first aiming member side, a second aiming member side, an aiming member end and an elongated cut-out intermediate the first and second aiming member sides. The cut-out and the aiming member sides are parallel to the parallel sides and the cut-out extends through the body.
    Type: Application
    Filed: October 3, 2025
    Publication date: January 29, 2026
    Inventors: Lawrence ALIOTO, David ENGLEFIELD