Patents Assigned to Cis-Lunar Development Laboratories, Inc.
  • Breathing apparatus mouthpiece
    Patent number: 5368018
    Abstract: A breathing apparatus mouthpiece which is reversibly switchable between an open circuit and a closed circuit system by rotating a special valve in the mouthpiece. The breathing apparatus mouthpiece is compact, lightweight, easy to operate and has low breathing resistance.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: November 29, 1994
    Assignee: Cis-Lunar Development Laboratories, Inc.
    Inventor: William C. Stone
  • Breathing apparatus mouthpiece
    Patent number: 5127398
    Abstract: A breathing apparatus mouthpiece which is reversibly switchable between an open circuit and a closed circuit system by rotating a special valve in the mouthpiece. The breathing apparatus mouthpiece is compact, lightweight, easy to operate and has low breathing resistance.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: July 7, 1992
    Assignee: Cis-Lunar Development Laboratories, Inc.
    Inventor: William C. Stone