Membership
Tour
Register
Log in
Mark Keck
Follow
Person
Belmont Shores, CA, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Rotary-poppet valve internal combustion engine
Patent number
4,075,986
Issue date
Feb 28, 1978
Mark Keck
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES