Patents by Inventor Fred Minkowski

Fred Minkowski 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).

  • Electrically tunable laser with cholesteric liquid crystal heliconical structure
    Patent number: 11444427
    Abstract: A lasing device includes an active layer comprising a cholesteric liquid crystal material and a laser dye, and a liquid crystal cell including spaced apart substrates defining a cell gap in which the active layer is disposed. The substrates include electrodes arranged to bias the active layer into an oblique helicoidal (ChOH) state. At least one substrate of the liquid crystal cell is optically transparent for a lasing wavelength range of the device.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: September 13, 2022
    Assignees: Kent State University, The University Court of the University of Aberdeen
    Inventors: Jie Xiang, Andrii Varanytsia, Fred Minkowski, Oleg D. Lavrentovich, Peter Palffy-Muhoray, Corrie T. Imrie, Daniel E. Paterson, John M. Storey
  • Apparatus for measuring surface profile of normal and shear stress
    Patent number: 11378477
    Abstract: An apparatus for measuring normal and shear stress at a surface. The apparatus includes a substrate; and a plurality of sensing units on the substrate. Each sensing unit includes a mechanical transducer having a receiving surface and a sensing surface; and a plurality of normal force sensors between the sensing surface and the substrate.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: July 5, 2022
    Assignee: KENT STATE UNIVERSITY
    Inventors: Mykhailo Pevnyi, Tianyi Guo, Fred Minkowski, Vincent Hetherington, Hiroshi Yokoyama, Peter Palffy-Muhoray
  • APPARATUS FOR MEASURING SURFACE PROFILE OF NORMAL AND SHEAR STRESS
    Publication number: 20200278283
    Abstract: An apparatus for measuring normal and shear stress at a surface. The apparatus includes a substrate; and a plurality of sensing units on the substrate. Each sensing unit includes a mechanical transducer having a receiving surface and a sensing surface; and a plurality of normal force sensors between the sensing surface and the substrate.
    Type: Application
    Filed: September 25, 2018
    Publication date: September 3, 2020
    Applicant: Kent State University
    Inventors: Mykhailo Pevnyi, Tianyi Guo, Fred Minkowski, Vincent Hetherington, Hiroshi Yokoyama, Peter Palffy-Muhoray
  • ELECTRICALLY TUNABLE LASER WITH CHOLESTERIC LIQUID CRYSTAL HELICONICAL STRUCTURE
    Publication number: 20180323570
    Abstract: A lasing device includes an active layer comprising a cholesteric liquid crystal material and a laser dye, and a liquid crystal cell including spaced apart substrates defining a cell gap in which the active layer is disposed. The substrates include electrodes arranged to bias the active layer into an oblique helicoidal (ChOH) state. At least one substrate of the liquid crystal cell is optically transparent for a lasing wavelength range of the device.
    Type: Application
    Filed: November 15, 2016
    Publication date: November 8, 2018
    Applicant: Kent State University
    Inventors: Jie Xiang, Andrii Varanytsia, Fred Minkowski, Oleg D. Lavrentovich, Peter Palffy-Muhoray, Corrie T. Imrie, Daniel E. Paterson, John M. Storey