Patents by Inventor Douglas E. Roberts

Douglas E. Roberts 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: 11938382
    Abstract: A method of making a golf club head includes the steps of providing a face of a club head, the face having a ball striking surface and a perimeter defining a border of the ball striking surface, providing a golf club head body that includes a crown, a sole, a toe, and a heel, attaching the face to a front portion of the club head body, and milling the ball striking surface and an edge portion of the face to cut a machined surface into the ball striking surface and the edge portion. The milled surface includes a plurality of first grooves located along the ball striking surface and defining a first depth, and a plurality of second grooves located adjacent the perimeter along the edge portion and defining a second depth. The first depth is different than the second depth.
    Type: Grant
    Filed: February 14, 2022
    Date of Patent: March 26, 2024
    Assignee: COBRA GOLF INCORPORATED
    Inventors: D. Clayton Evans, Cameron J. Day, Michael T. McDonnell, Ryan L. Roach, Douglas E. Roberts, Bryce Hobbs, Yi-Ching Liao
  • Patent number: 11285365
    Abstract: The invention provides golf clubs and methods of making golf clubs with machined perimeter faces. The club faces provide an accurate ball striking surface and improved aerodynamics. In particular, a surface is milled into the club face that expands over an edge of a ball striking surface and onto a portion of the face adjacent to at least one of a crown, a sole, a toe, or a heel. During a swing, the milled surface causes the boundary layer of airflow to separate at a point closer to the rear of the club head, resulting in reduced drag.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: March 29, 2022
    Assignee: COBRA GOLF INCORPORATED
    Inventors: D. Clayton Evans, Cameron J. Day, Michael T. McDonnell, Ryan L. Roach, Douglas E. Roberts, Bryce Hobbs, Yi-ching Liao
  • Patent number: 11063996
    Abstract: An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: July 13, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: John J. Rae, Nathaniel J. Radcliffe, Daniel J. Stone, Trent E. Garner, Brad S. Hooley, Robert J. Horacek, Sam G. Lacey, Jeff D. Brunski, Kevin Schaeffer, Scott A. Carlyle, Stephen C. Chien, Craig R. Schnell, Douglas E. Roberts, Dan S. Nivanh, Michael J. Wallans
  • Patent number: 10835787
    Abstract: The invention provides golf clubs and methods of making golf clubs with machined perimeter faces. The club faces provide an accurate ball striking surface and improved aerodynamics. In particular, a surface is milled into the club face that expands over an edge of a ball striking surface and onto a portion of the face adjacent to at least one of a crown, a sole, a toe, or a heel. During a swing, the milled surface causes the boundary layer of airflow to separate at a point closer to the rear of the club head, resulting in reduced drag.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: November 17, 2020
    Assignee: COBRA GOLF CORPORATION
    Inventors: D. Clayton Evans, Cameron J. Day, Michael T. McDonnell, Ryan L. Roach, Douglas E. Roberts, Bryce Hobbs, Yi-ching Liao
  • Publication number: 20200322462
    Abstract: An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.
    Type: Application
    Filed: June 19, 2020
    Publication date: October 8, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: John J. RAE, Nathaniel J. RADCLIFFE, Daniel J. STONE, Trent E. GARNER, Brad S. HOOLEY, Robert J. HORACEK, Sam G. LACEY, Jeff D. BRUNSKI, Kevin SCHAEFFER, Scott A. CARLYLE, Stephen C. CHIEN, Craig R. SCHNELL, Douglas E. ROBERTS, Dan S. NIVANH, Michael J. WALLANS
  • Patent number: 10721339
    Abstract: An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: July 21, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: John J. Rae, Nathaniel J. Radcliffe, Daniel J. Stone, Trent E. Garner, Brad S. Hooley, Robert J. Horacek, Sam G. Lacey, Jeff D. Brunski, Kevin Schaeffer, Scott A. Carlyle, Stephen C. Chien, Craig R. Schnell, Douglas E. Roberts, Dan S. Nivanh, Michael J. Wallans
  • Patent number: D943693
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: February 15, 2022
    Assignee: Cobra Golf Incorporated
    Inventors: Christopher G. Engel, Armando Herrera, Ang-Ju Lee, Douglas E. Roberts, Sean Tang
  • Patent number: D981517
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: March 21, 2023
    Assignee: Cobra Golf Incorporated
    Inventors: Cameron J. Day, Douglas E. Roberts, Jose Miraflor, III
  • Patent number: D993342
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: July 25, 2023
    Assignee: Cobra Golf Incorporated
    Inventors: Cameron J. Day, Douglas E. Roberts, Jose Miraflor, III
  • Patent number: D994060
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: August 1, 2023
    Assignee: Cobra Golf Incorporated
    Inventors: Rob Shapiro, Douglas E. Roberts, Kassie Betts
  • Patent number: D1002766
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: October 24, 2023
    Assignee: Cobra Golf Incorporated
    Inventors: Cameron J. Day, Douglas E. Roberts, Jose Miraflor, III
  • Patent number: D1003378
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: October 31, 2023
    Assignee: Cobra Golf Incorporated
    Inventors: Christopher G. Engel, Armando Herrera, Ang-Ju Lee, Douglas E. Roberts, Sean Tang
  • Patent number: D1017742
    Type: Grant
    Filed: June 2, 2022
    Date of Patent: March 12, 2024
    Assignee: Cobra Golf Incorporated
    Inventors: Ang-Ju Lee, Christopher G. Engel, Cameron J. Day, Douglas E. Roberts, Sean Tang
  • Patent number: D1018743
    Type: Grant
    Filed: June 2, 2022
    Date of Patent: March 19, 2024
    Assignee: Cobra Golf Incorporated
    Inventors: Rob Shapiro, Douglas E. Roberts, Robert R. Nicanor
  • Patent number: D1018744
    Type: Grant
    Filed: June 2, 2022
    Date of Patent: March 19, 2024
    Assignee: Cobra Golf Incorporated
    Inventors: Rob Shapiro, Douglas E. Roberts, Robert R. Nicanor
  • Patent number: D1023198
    Type: Grant
    Filed: June 2, 2022
    Date of Patent: April 16, 2024
    Assignee: Cobra Golf Incorporated
    Inventors: Ang-Ju Lee, Christopher G. Engel, Cameron J. Day, Douglas E. Roberts, Sean Tang
  • Patent number: D1034866
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: July 9, 2024
    Assignee: Cobra Golf Incorporated
    Inventors: Douglas E. Roberts, Karl A. Clausen
  • Patent number: D1040273
    Type: Grant
    Filed: November 11, 2022
    Date of Patent: August 27, 2024
    Assignee: Cobra Golf Incorporated
    Inventors: Christopher G. Engel, Ang-Ju Lee, Steven M. Mitzel, Douglas E. Roberts
  • Patent number: D1043878
    Type: Grant
    Filed: June 20, 2023
    Date of Patent: September 24, 2024
    Assignee: Cobra Golf Incorporated
    Inventors: Cameron J. Day, Douglas E. Roberts, Jose Miraflor, III
  • Patent number: D1059518
    Type: Grant
    Filed: January 25, 2023
    Date of Patent: January 28, 2025
    Assignee: Cobra Golf Incorporated
    Inventors: Daniel Chelius, Rob Shapiro, Cameron J. Day, Douglas E. Roberts