Douglas Marshall Johns

Person

  • Topanga, CA, US

Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    ROTATING BARREL TYPE INTERNAL COMBUSTION ENGINE

    • Publication number 20070169728
    • Publication date Jul 26, 2007
    • Lawrence C. Chasin
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Rotating positive displacement engine

    • Publication number 20030131807
    • Publication date Jul 17, 2003
    • Douglas Marshall Johns
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES