| http://www.w3.org/ns/prov#value | - When put to use, the instrument, such as a surgical retractor, assumes a position at which its operative section lies adjacent the field of medical interest, such as a body cavity or surgical...http://www.google.com/patents/US4562832?utm_source=gb-gplus-sharePatent US4562832 - Medical instrument and light pipe illumination assemblyAdvanced Patent SearchPublication numberUS4562832 APublication type
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