Link To My Granddad's Contribution to a Coal Gasification Patent

http://www.google.com/patents?id=t3o2AAAAEBAJ&pg=PA1&dq=harry+hamilton+gasification&hl=en&sa=X&ei=-iRpT9OaGMLl0QH45a2VCQ&sqi=2&ved=0CDIQ6AEwAA#v=onepage&q=harry%20hamilton%20gasification&f=false

and links to his other patents
Search www.google.com/patents
and harry hamilton natrona heights