Patents by Inventor Martin Koornneef

Martin Koornneef 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).

  • Publication number: 20200192075
    Abstract: An illuminated reticle system for use with an optical viewing device, such as a riflescope, that includes a light source, a transparent substrate carrying a reticle such as a diffraction grating, and a Fresnel lens interposed between the light source and an entry surface into the transparent substrate through which light from the light source propagates toward the reticle along a converging beam path. The Fresnel lens provides strong positive optical power in a very small, lightweight, and inexpensive package to thereby cause light diverging from the light source to converge toward the reticle, which then redirects at least some of the light toward a viewer along an optical path of the optical viewing device as a diverging bundle of output light to fill an exit pupil of the optical viewing device.
    Type: Application
    Filed: December 18, 2019
    Publication date: June 18, 2020
    Applicant: Leupold & Stevens, Inc.
    Inventor: Martin KOORNNEEF
  • Patent number: 9435610
    Abstract: A reticle of a projectile-weapon aiming system such as a riflescope includes first and second series of secondary aiming marks spaced apart below a primary aiming point, the first and second series providing holdover aiming points for regularly incrementing target distances for respective subsonic and supersonic .300 AAC Blackout ammunition, or other differing types of ammunition, without requiring adjustment of the optics or settings of the aiming system.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: September 6, 2016
    Assignee: Leupold & Stevens, Inc.
    Inventors: Robert Silvers, Martin Koornneef, Raymond G. Brock, Stephen R. Hodge, Richard Bradley Brumfield
  • Publication number: 20150354921
    Abstract: A reticle of a projectile-weapon aiming system such as a riflescope includes first and second series of secondary aiming marks spaced apart below a primary aiming point, the first and second series providing holdover aiming points for regularly incrementing target distances for respective subsonic and supersonic .300 AAC Blackout ammunition, or other differing types of ammunition, without requiring adjustment of the optics or settings of the aiming system.
    Type: Application
    Filed: April 24, 2015
    Publication date: December 10, 2015
    Inventors: Robert Silvers, Martin Koornneef, Raymond G. Brock, Stephen R. Hodge
  • Patent number: 9038307
    Abstract: A reticle of a projectile-weapon aiming system such as a riflescope includes first and second series of secondary aiming marks spaced apart below a primary aiming point, the first and second series providing holdover aiming points for regularly incrementing target distances for respective subsonic and supersonic .300 AAC Blackout ammunition, or other differing types of ammunition, without requiring adjustment of the optics or settings of the aiming system.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: May 26, 2015
    Assignee: Leupold & Stevens, Inc.
    Inventors: Robert Silvers, Martin Koornneef, Raymond G. Brock, Stephen R. Hodge
  • Publication number: 20140373424
    Abstract: A reticle of a projectile-weapon aiming system such as a riflescope includes first and second series of secondary aiming marks spaced apart below a primary aiming point, the first and second series providing holdover aiming points for regularly incrementing target distances for respective subsonic and supersonic .300 AAC Blackout ammunition, or other differing types of ammunition, without requiring adjustment of the optics or settings of the aiming system.
    Type: Application
    Filed: November 20, 2013
    Publication date: December 25, 2014
    Applicant: Leupold & Stevens, Inc.
    Inventors: Robert Silvers, Martin Koornneef, Raymond G. Brock, Stephen R. Hodge
  • Patent number: D587333
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: February 24, 2009
    Assignee: Leupold & Stevens, Inc.
    Inventors: Victoria J. Peters, Andrew W. York, Martin Koornneef
  • Patent number: D704295
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: May 6, 2014
    Assignee: Leupold & Stevens, Inc.
    Inventors: Stephen R. Hodge, Martin Koornneef
  • Patent number: D709588
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: July 22, 2014
    Assignee: Leupold & Stevens, Inc.
    Inventors: Robert Silvers, Martin Koornneef, Raymond G. Brock, Stephen R. Hodge
  • Patent number: D753785
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: April 12, 2016
    Assignee: Leupold & Stevens, Inc.
    Inventors: Robert Silvers, Martin Koornneef, Raymond G. Brock, Stephen R. Hodge, Richard Bradley Brumfield