Patents Assigned to Topholm & Westermann I/S
  • In-the-ear hearing aid
    Patent number: 4550227
    Abstract: A hearing aid which can be worn in the ear concha and which contains a microphone, an amplifier, an earphone, a battery and a connection to an ear adapter. All components are mounted in a flat, cylindrical housing (1), whose cover (2) can be rotated around a hollow shaft (6) which acts as the sound inlet channel (4), actuates the on/off switch (8, 9) and carries on its inner side at least one wiper (11) which, in contact with at least one resistive strip (10), acts as a volume control.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: October 29, 1985
    Assignee: Topholm & Westermann I/S
    Inventor: Christian Topholm
  • Hearing aid
    Patent number: D287280
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: December 16, 1986
    Assignee: Topholm & Westermann I/S
    Inventor: Christian Topholm
  • Hearing aid
    Patent number: D287764
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: January 13, 1987
    Assignee: Topholm & Westermann I/S
    Inventor: Christian Topholm
  • Hearing aid
    Patent number: D287765
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: January 13, 1987
    Assignee: Topholm & Westermann I/S
    Inventor: Christian Topholm