Patents by Inventor Steven D. Keller

Steven D. Keller 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: 10122072
    Abstract: A nanofabric antenna is provided. The nanofabric antenna can include a fabric and a plurality of conductive nanowires extending outwardly from the fabric with the conductive nanowires forming a random array of monopoles. In this manner, an antenna can be included as part of a piece of clothing and/or a piece of fabric used or worn by an individual.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: November 6, 2018
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Amir I. Zaghloul, Steven D. Keller
  • Patent number: 10014581
    Abstract: A radio frequency patch antenna having a radiator patch constructed of an anisotropic material, such as carbon nanotube sheet material. Such material is flexible so that the antenna may be wearable and/or integrated into a textile substrate. A feed line couples the radio signal to the patch. Furthermore, the efficiency of radiation from the patch is directly related to the orientation of the fibers or carbon nanotubes in the anisotropic material relative to the orientation of the feed line. Dual polarized radiators can be constructed from two orthogonal layers of CNT patches fed with correspondingly orthogonal feed lines.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: July 3, 2018
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Steven D. Keller, Amir I. Zaghloul
  • Publication number: 20160126633
    Abstract: A radio frequency patch antenna having a radiator patch constructed of an anisotropic material, such as carbon nanotube sheet material. Such material is flexible so that the antenna may be wearable and/or integrated into a textile substrate. A feed line couples the radio signal to the patch. Furthermore, the efficiency of radiation from the patch is directly related to the orientation of the fibers or carbon nanotubes in the anisotropic material relative to the orientation of the feed line. Dual polarized radiators can be constructed from two orthogonal layers of CNT patches fed with correspondingly orthogonal feed lines.
    Type: Application
    Filed: October 22, 2015
    Publication date: May 5, 2016
    Inventors: Steven D. Keller, Amir I. Zaghloul
  • Patent number: 9276305
    Abstract: A method and apparatus for providing multiple functions using nanotube threads comprising: a first nanotube thread and a second nanotube thread, the first nanotube thread and the second nanotube thread arranged to form a mesh, wherein the first nanotube thread further comprises a measurable invariant property and the second nanotube thread comprises a measurable variant property.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: March 1, 2016
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Steven D. Keller, Amir I. Zaghloul
  • Publication number: 20130293429
    Abstract: A method and apparatus for providing multiple functions using nanotube threads comprising: a first nanotube thread and a second nanotube thread, the first nanotube thread and the second nanotube thread arranged to form a mesh, wherein the first nanotube thread further comprises a measurable invariant property and the second nanotube thread comprises a measurable variant property.
    Type: Application
    Filed: November 28, 2012
    Publication date: November 7, 2013
    Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I
    Inventors: Steven D. Keller, Amir I. Zaghloul
  • Publication number: 20130207850
    Abstract: A nanofabric antenna is provided. The nanofabric antenna can include a fabric and a plurality of conductive nanowires extending outwardly from the fabric with the conductive nanowires forming a random array of monopoles. In this manner, an antenna can he included as part of a piece of clothing and/or a piece of fabric used or worn by an individual.
    Type: Application
    Filed: February 9, 2012
    Publication date: August 15, 2013
    Inventors: Amir I. Zaghloul, Steven D. Keller
  • Patent number: 5785129
    Abstract: A row crop cultivator has a plurality of domed discs suspended in pairs from a suspension system in which the discs are firmly restrained against lateral movement relative to the crop row being cultivated but are free to move vertically to adjust to uneven conditions or obstacles of the ground. A generally cylindrical band is fixed to one side of each disc and has a smaller diameter than the disc diameter defining a cylindrical surface which rides on the surface of the ground and permits the disc to penetrate the soil only to a predetermined depth. The cylindrical surface if of sufficient width that it supports the disc in a floating manner over the ground and a uniform depth of cultivation is achieved, whereby damage to crops from excessive disc penetration is avoided.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: July 28, 1998
    Inventors: Russell J. Keller, Steven D. Keller