Patents by Inventor Gregory C. Sharrow

Gregory C. Sharrow 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).

  • DUO-PROPELLERS AND SINGLE PROPELLERS
    Publication number: 20250360996
    Abstract: A duo propeller disclosed having a forward propeller having increased loading distribution and high swirl near the tip. The duo propeller has an aft propeller with a more optimal loading distribution that can cancel the high tip swirl from the forward propeller. The duo-propeller an enhanced ability for the aft propeller to capture the energy lost to the swirling flow of the forward propeller's outflow.
    Type: Application
    Filed: July 16, 2025
    Publication date: November 27, 2025
    Inventor: Gregory C. Sharrow
  • Duo-propellers and single propellers
    Patent number: 12397889
    Abstract: A duo propeller disclosed having a forward propeller having increased loading distribution and high swirl near the tip. The duo propeller has an aft propeller with a more optimal loading distribution that can cancel the high tip swirl from the forward propeller. The duo-propeller an enhanced ability for the aft propeller to capture the energy lost to the swirling flow of the forward propeller's outflow.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: August 26, 2025
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • DUO-PROPELLERS AND SINGLE PROPELLERS
    Publication number: 20220340247
    Abstract: A duo propeller disclosed having a forward propeller having increased loading distribution and high swirl near the tip. The duo propeller has an aft propeller with a more optimal loading distribution that can cancel the high tip swirl from the forward propeller. The duo-propeller an enhanced ability for the aft propeller to capture the energy lost to the swirling flow of the forward propeller's outflow.
    Type: Application
    Filed: April 21, 2022
    Publication date: October 27, 2022
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D974267
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: January 3, 2023
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D974268
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: January 3, 2023
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D974269
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: January 3, 2023
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D974270
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: January 3, 2023
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D987545
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: May 30, 2023
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Duo-prop propeller
    Patent number: D988967
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: June 13, 2023
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D1011257
    Type: Grant
    Filed: December 2, 2022
    Date of Patent: January 16, 2024
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D1014390
    Type: Grant
    Filed: December 2, 2022
    Date of Patent: February 13, 2024
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D1014391
    Type: Grant
    Filed: December 2, 2022
    Date of Patent: February 13, 2024
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller
    Patent number: D1015251
    Type: Grant
    Filed: December 2, 2022
    Date of Patent: February 20, 2024
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Duo-propeller
    Patent number: D1029041
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: May 28, 2024
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Duo-propeller
    Patent number: D1083739
    Type: Grant
    Filed: April 5, 2023
    Date of Patent: July 15, 2025
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Duo-propeller
    Patent number: D1084031
    Type: Grant
    Filed: April 3, 2024
    Date of Patent: July 15, 2025
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller with stepped hub
    Patent number: D1078583
    Type: Grant
    Filed: August 23, 2022
    Date of Patent: June 10, 2025
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow
  • Propeller with stepped hub
    Patent number: D1086005
    Type: Grant
    Filed: February 17, 2023
    Date of Patent: July 29, 2025
    Inventor: Gregory C. Sharrow
  • Propeller with stepped hub
    Patent number: D1099814
    Type: Grant
    Filed: May 6, 2025
    Date of Patent: October 28, 2025
    Assignee: Sharrow Engineering LLC
    Inventor: Gregory C. Sharrow