Patents by Inventor John H. Brywig

John H. Brywig 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).

  • Mechanical broadhead
    Patent number: 8449416
    Abstract: A mechanical broadhead having blades movable from a retracted mode to a deployed mode is provided including a generally external retainer element which holds the blades in the retracted mode, but also selectively releases the blades so that they can transition to the deployed mode. The retainer element can include a collar and one or more tabs. A blade can include a projection and/or a recess that is engaged by one or more tabs to secure the blade in the retracted position. The tabs can be paired and can define a retainer slot therebetween. The blade can be at least partially disposed in the retainer slot in the retracted mode and/or in the deployed mode.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: May 28, 2013
    Assignee: Grace Engineering Corp.
    Inventors: Nathaniel E. Grace, John H. Brywig
  • MECHANICAL BROADHEAD
    Publication number: 20120178560
    Abstract: A mechanical broadhead having blades movable from a retracted mode to a deployed mode is provided including a generally external retainer element which holds the blades in the retracted mode, but also selectively releases the blades so that they can transition to the deployed mode. The retainer element can include a collar and one or more tabs. A blade can include a projection and/or a recess that is engaged by one or more tabs to secure the blade in the retracted position. The tabs can be paired and can define a retainer slot therebetween. The blade can be at least partially disposed in the retainer slot in the retracted mode and/or in the deployed mode.
    Type: Application
    Filed: January 10, 2012
    Publication date: July 12, 2012
    Applicant: Grace Engineering Corp.
    Inventors: Nathaniel E. Grace, John H. Brywig
  • Battery holder for a lighted archery nock
    Patent number: 7993224
    Abstract: The present invention generally relates to a lighted archery nock. The lighted archery nock generally includes an accelerometer, a replaceable battery, a light, a housing, and a microprocessor that controls illumination of the light. The microprocessor can control the timing of the light to save battery life and respond to user input transmitted by tapping the nock to re-set the light. The housing is configured with a plurality of fingers that interact with the replaceable battery to hold it in place.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: August 9, 2011
    Assignee: Grace Engineering Corp.
    Inventor: John H. Brywig
  • BATTERY HOLDER FOR A LIGHTED ARCHERY NOCK
    Publication number: 20090098960
    Abstract: The present invention generally relates to a lighted archery nock. The lighted archery nock generally includes an accelerometer, a replaceable battery, a light, a housing, and a microprocessor that controls illumination of the light. The microprocessor can control the timing of the light to save battery life and respond to user input transmitted by tapping the nock to re-set the light. The housing is configured with a plurality of fingers that interact with the replaceable battery to hold it in place.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 16, 2009
    Applicant: GRACE ENGINEERING CORP.
    Inventor: John H. Brywig