Patents by Inventor Sean P. Branagan

Sean P. Branagan 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).

  • Aluminum nitride single crystals having controllable color and methods of forming them
    Patent number: 11840773
    Abstract: In various embodiments, single-crystal aluminum nitride boules and substrates are highly visibly transparent and have low Urbach energies and/or absorption coefficients at deep-ultraviolet wavelengths. The single-crystal aluminum nitride may function as a platform for the fabrication of light-emitting devices such as light-emitting diodes and lasers.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: December 12, 2023
    Assignee: Crystal IS, Inc.
    Inventors: Robert T. Bondokov, James R. Grandusky, Jianfeng Chen, Sean P. Branagan, Shichao Wang, Toru Kimura, Thomas Miebach, Keisuke Yamaoka, Leo J. Schowalter