Revision history of "File:Patent-GB-1017991.pdf"

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  • (cur | prev) 01:40, 2 December 2013Piccardi (talk | contribs). . (455 bytes) (+455). . ({{PatentInfo |Inventor=Derrick John Silver |Assignee=Mentmore Manufacturing Company Limited |Country=GB |ApplicationNum=2267/61 |ApplicationDate=1961-03-03 |PatentNum=1017991 |PatentDate=1966-01-26 |PriorityDate=1961-03-03 |Titolo=Improvements in self-...)