Patents by Inventor Eric S. Nakayama

Eric S. Nakayama 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: 8544704
    Abstract: The disclosed invention is a threader for use with various modular tactical vest systems. The particular modular vest systems have a weaving interface with attachable storage modules. A strap on a module is attached to the threader and the threader is woven through the support web on the vest. As the threader is pulled through the support web, the module is secured to the vest. Two embodiments for attaching the strap to the threader are disclosed.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: October 1, 2013
    Assignee: Magpul Industries Corp
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Brian L. Nakayama, Eric S. Nakayama
  • Patent number: 8261649
    Abstract: The present invention is a charging handle for an automatic, bolt actuated rifle. The handle features a ratcheting retraction assist and blowback diversion structures.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: September 11, 2012
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Brian L. Nakayama, Eric S. Nakayama
  • Patent number: 8166692
    Abstract: The present invention is a self-leveling follower for an ammunition magazine. Side extensions provide greater stability to the follower and aid in its self-leveling feature. The follower according to the present invention is also manufactured to facilitate removal from and insertion into the magazine casing when maintaining the magazine. Additional features provide greater utility by improving bolt-stop capacity and consistency of ammunition feed.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: May 1, 2012
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Brian L. Nakayama, Eric S. Nakayama
  • Patent number: 8061071
    Abstract: The present invention is a high capacity, non-drum magazine. The high capacity magazine comprises a broad general storage area capable of holding four staggered stacks of ammunition, a unified follower on a spring system biasing the follower and associated ammunition, a central partition a barrier separating two dual staggered round stacks and around which the follower will pass, and a transition area between the feed end of the magazine and the storage area. The spring may be a composite spring system, made of two springs joined in series, or a single, variable constant, spring.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: November 22, 2011
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Michael Morgan, Eric C. Burt, Eric S. Nakayama
  • Publication number: 20110253756
    Abstract: The disclosed invention is a threader for use with various modular tactical vest systems. The particular modular vest systems have a weaving interface with attachable storage modules. A strap on a module is attached to the threader and the threader is woven through the support web on the vest. As the threader is pulled through the support web, the module is secured to the vest. Two embodiments for attaching the strap to the threader are disclosed.
    Type: Application
    Filed: February 9, 2006
    Publication date: October 20, 2011
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Brian L. Nakayama, Eric S. Nakayama
  • Publication number: 20110226120
    Abstract: The present invention is a charging handle for an automatic, bolt actuated rifle. The handle features a ratcheting retraction assist and blowback diversion structures.
    Type: Application
    Filed: February 9, 2007
    Publication date: September 22, 2011
    Applicant: MAGPUL INDUSTRIES CORP.
    Inventors: Richard M. Fitzpatrick, Brian L. Nakayama, Eric S. Nakayama
  • Publication number: 20110113663
    Abstract: The present invention is a self-leveling follower for an ammunition magazine. Side extensions provide greater stability to the follower and aid in its self-leveling feature. The follower according to the present invention is also manufactured to facilitate removal from and insertion into the magazine casing when maintaining the magazine. Additional features provide greater utility by improving bolt-stop capacity and consistency of ammunition feed.
    Type: Application
    Filed: May 3, 2010
    Publication date: May 19, 2011
    Applicant: Magpul Industries Corp.
    Inventors: Brian L. Nakayama, Eric S. Nakayama, Richard M. Fitzpatrick, Michael T. Mayberry
  • Patent number: 7908780
    Abstract: The present invention is an ammunition magazine, preferably made of a glass fiber reinforced polymer, utilizing a structurally enhancing ridge, angular guide rails and a follower made to interface with said guide rails to reduce wobble. The preferred embodiment also features a protective cover that distributes forces from the spring to more structurally sound areas of the magazine, thus reducing feed end splay, and an ammunition indication system comprised of at least one window and a noticeable marker on the follower spring. The follower and magazine casing are also designed to interface to prevent the follower from popping out of the feed end and the floor plate of the magazine utilizes a locking plate and sliding relationship between the floor plate, locking plate and magazine to secure the floor plate onto the magazine casing. The cover features built in tools for, among other things, unloading and disassembling the magazine.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: March 22, 2011
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael Mayberry, Eric S. Nakayama
  • Publication number: 20100251590
    Abstract: The present invention is an ammunition magazine, preferably made of a glass fiber reinforced polymer, utilizing a structurally enhancing ridge, angular guide rails and a follower made to interface with said guide rails to reduce wobble. The preferred embodiment also features a protective cover that distributes forces from the spring to more structurally sound areas of the magazine, thus reducing feed end splay, and an ammunition indication system comprised of at least one window and a noticeable marker on the follower spring. The follower and magazine casing are also designed to interface to prevent the follower from popping out of the feed end and the floor plate of the magazine utilizes a locking plate and sliding relationship between the floor plate, locking plate and magazine to secure the floor plate onto the magazine casing. The cover features built in tools for, among other things, unloading and disassembling the magazine.
    Type: Application
    Filed: December 17, 2007
    Publication date: October 7, 2010
    Applicant: MAGPUL INDUSTRIES CORP
    Inventors: Richard M. Fitzpatrick, Michael Mayberry, Eric S. Nakayama
  • Publication number: 20100205846
    Abstract: The present invention is a modular gunstock utilizing a two-piece mounting structure and a stock module. The structure comprises a weapon attachment, in the case of an AR15/M16 rifle a receiver extension tube, and a sleeve slidable over said attachment and containing mounting structure for the stock module. The disclosed stock module is adjustable for length and features a length pre-set system, a latch with independent dual-pawls and an integrated impact buffer, modular tailpiece, and storage. The sleeve also features a position selectable fixed cheek plate.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 19, 2010
    Applicant: MAGPUL INDUSTRIES CORP
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Brian L. Nakayama, Eric S. Nakayama
  • Patent number: 7762018
    Abstract: The present invention is a modular gunstock utilizing a two-piece mounting structure and a stock module. The structure comprises a weapon attachment, in the case of an AR15/M16 rifle a receiver extension tube, and a sleeve slidable over said attachment and containing mounting structure for the stock module. The disclosed stock module is adjustable for length and features a length pre-set system, a latch with independent dual-pawls and an integrated impact buffer, modular tailpiece, and storage. The sleeve also features a position selectable fixed cheek plate.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: July 27, 2010
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Eric S. Nakayama, Brian L. Nakayama
  • Publication number: 20100126053
    Abstract: The present invention is a high capacity, non-drum magazine. The high capacity magazine comprises a broad general storage area capable of holding four staggered stacks of ammunition, a unified follower on a spring system biasing the follower and associated ammunition, a central partition a barrier separating two dual staggered round stacks and around which the follower will pass, and a transition area between the feed end of the magazine and the storage area. The spring may be a composite spring system, made of two springs joined in series, or a single, variable constant, spring.
    Type: Application
    Filed: July 17, 2009
    Publication date: May 27, 2010
    Applicant: MAGPUL INDUSTRIES CORP.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Michael Morgan, Eric C. Burt, Eric S. Nakayama
  • Patent number: 7621063
    Abstract: The present invention is a self-leveling follower for an ammunition magazine. Side extensions provide greater stability to the follower and aid in its self-leveling feature. The follower according to the present invention is also manufactured to facilitate removal from and insertion into the magazine casing when maintaining the magazine. Additional features provide greater utility by improving bolt-stop capacity and consistency of ammunition feed.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: November 24, 2009
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Eric S. Nakayama
  • Publication number: 20090107022
    Abstract: The present invention is a self-leveling follower for an ammunition magazine. Side extensions provide greater stability to the follower and aid in its self-leveling feature. The follower according to the present invention is also manufactured to facilitate removal from and insertion into the magazine casing when maintaining the magazine. Additional features provide greater utility by improving bolt-stop capacity and consistency of ammunition feed.
    Type: Application
    Filed: February 9, 2006
    Publication date: April 30, 2009
    Applicant: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Eric S. Nakayama
  • Patent number: D596693
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: July 21, 2009
    Assignee: Magpul Industries Corp.
    Inventor: Eric S. Nakayama
  • Patent number: D600771
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: September 22, 2009
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Eric S. Nakayama, Brian L. Nakayama
  • Patent number: D614721
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: April 27, 2010
    Assignee: Magpul Industries Corp.
    Inventors: Richard M. Fitzpatrick, Michael T. Mayberry, Nick Booras, Brian L. Nakayama, Eric S. Nakayama, Justin Juarez
  • Patent number: D779018
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: February 14, 2017
    Assignee: Magpul Industries Corporation
    Inventors: Richard A. Zayatz, Yehezkel Eitan, Jonathan Canipe, Eric S. Nakayama
  • Patent number: D781392
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: March 14, 2017
    Assignee: Magpul Industries Corporation
    Inventors: Richard A. Zayatz, Yehezkel Eitan, Jonathan Canipe, Eric S. Nakayama