Robert L. Campbell

Person

  • Hesperia, CA, US

Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    CONCENTRIC INTERNAL COMBUSTION ROTARY ENGINE

    • Publication number 20070068481
    • Publication date Mar 29, 2007
    • Robert L. Campbell
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES