Patents Assigned to Jonathan C. Langmaid, Inc.
  • Extendable level
    Patent number: 4894925
    Abstract: An extendable level consists of two interslidable parts having a track and slide strips in a simple construction, wherein there is always a planar relationship between the level edges. The slidable extension rests within the length of the main body when unextended.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: January 23, 1990
    Assignee: Jonathan C. Langmaid, Inc.
    Inventor: Jonathan C. Langmaid