Patents Assigned to Paul Heusinkveld
  • Keyboard for one-hand operation
    Patent number: 4791408
    Abstract: A data entry device having five keys, not in one plane, is held in and operated by one hand. Each key has two "on" positions and one "off" position. By using a single key or chord of keys to form characters, a surplus of possible combinations is generated. Because it is grippable and requires only one hand to operate, the user can utilized it while simultaneously walking, writing, reading, commuting, using a phone, holding a conversation, or engaging in related and unrelated activities.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: December 13, 1988
    Assignees: Ted Scudder, Paul Heusinkveld
    Inventor: Paul Heusinkveld
  • Binder for perforated sheets
    Patent number: 4607970
    Abstract: A one piece binder for perforated sheets, including a base portion and at least a ring. The ring comprised two members which, when locked, present a smooth and continuous surface and, when unlocked, are spring-biased apart. The locking means on one ring member terminates in resilient guide and latching portions which are received in an apertured portion of the other member.
    Type: Grant
    Filed: February 5, 1985
    Date of Patent: August 26, 1986
    Assignees: Ted Scudder, Paul Heusinkveld
    Inventor: Paul Heusinkveld