Patents by Inventor Jan Tragardh

Jan Tragardh 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: 4893344
    Abstract: A headset (1) with sound receiving microphone (6) and sound reproducing transducer (3) is arranged to be worn on a person's outer ear (2). For this purpose, the headset has a post auricle mount (9) with a lengthwise adjustable stabilizer (10) behind the ear, said post auricle mount being secured to the sound reproducing transducer housing (3) in a pivotable manner, hereby enabling it to be swivelled in several directions.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: January 9, 1990
    Assignee: GN Netcom A/S
    Inventors: Jan Tragardh, Bjarne Jonsson, Finn Jensen
  • Patent number: 4224168
    Abstract: A holder of elastic material for filter bags open at the top for preparing beverages, especially tea and coffee, which comprises a tubular stud having two oppositely arranged stud sections connected at their upper ends by an annular member and spaced from each other by a slot having two diametrically arranged slot sections while at least one manually operable spring-urged pressure member is provided which is adapted to press the stud sections toward each other to reduce the diameter of the stud and thereby facilitate the placing of a filter bag on the stud. Advantageously the stud sections are provided with tapering surfaces to facilitate the slipping of a filter bag onto the stud, while barbs or the like are provided on the stud sections for piercing an inserted filter bag and holding the same.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: September 23, 1980
    Assignee: Teafilter International A/PS
    Inventor: Jan Tragardh