Drilldown: Patents
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Patents > Applicant firm:
None
& Supplementary to patent :
Patent GB-1909-8531 or
Patent GB-1911-29012 or
Patent US-1913-04-21 George Raymond Lawrence
& National tech categories:
USPC 244/80
& Cites these patents :
1887 or
Patent GB-1909-3202
& Citations from after 1930:
None
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