Patents by Inventor Peter Alfred Czerner

Peter Alfred Czerner 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).

  • Cutter head assembly
    Patent number: 4089109
    Abstract: A cutter head assembly for a foil type electric dry shaver wherein the outer cutter foil is provided with a plurality of bowed arcuate outer cutting surfaces and wherein the inner cutter assembly comprises a balanced arrangement of individual blade members each having a plurality of arcuate cutting edges for engagement with the undersurface of the bowed arcuate outer cutting foil.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: May 16, 1978
    Assignee: Sperry Rand Corporation
    Inventors: Peter Alfred Czerner, Michael John Marchetti
  • Switch arrangement for hand-held portable electrical appliances
    Patent number: 3997968
    Abstract: An electric power switch arrangement for a hand-held, portable electrical appliance is disclosed which provides improved positive, mechanical switch detenting. A mount for the switch comprises a receptacle having integrally formed fingers for gripping and captivating the switch.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: December 21, 1976
    Assignee: Sperry Rand Corporation
    Inventors: Peter Alfred Czerner, Edward Szymansky