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http://www.google.sh/patents/US2681455?utm_source=gb-gplus-share
Patent US2681455 - CARRIER FOR INVALIDS COMBINING HORI
CARRIER FOR INVALIDS COMBINING HORI
William A. Schwartz et al
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Patent number
: 2681455
Filing date
: 5 Apr 1952
Issue date
: 22 Jun 1954
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