Patents by Inventor Nai Keung Chen

Nai Keung Chen 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: 4016648
    Abstract: A safety razor comprises a blade seat member having a transversely elongated guard surface, and a first plurality of upwardly extending support posts. A first razor blade is situated on the blade seat member with a cutting edge spaced upwardly and rearwardly of the guard surface. A plurality of perforations are formed in the first blade and the first plurality of support posts extend upwardly through the perforations. A second razor blade is positioned above the first blade in abutting engagement with the top surfaces of the first plurality of support posts. The second blade includes a cutting edge spaced upwardly and rearwardly of the cutting edge of the first blade, and a plurality of perforations formed therethrough. A cap member is positioned above the second blade, and includes a second plurality of support posts extending downwardly through the perforations in the second blade and in abutting engagement with the top surface of the first blade.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: April 12, 1977
    Assignee: Warner-Lambert Company
    Inventors: Evan Nai-keung Chen, Edward A. Beddall
  • Patent number: D1016645
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: March 5, 2024
    Inventor: Nai Keung Chen