RH

Roy Howarth

MT Mechanical Technology: 2 patents #27 of 79Top 35%
Overall (All Time): #2,347,651 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4582328 Double acting stirling engine piston ring — 1986-04-15
4422649 Stirling engine piston ring — 1983-12-27