Christopher Polhem (1661-1751), mechanic, inventor, married to Maria Hoffman
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citations:
  retrieved: 2017-11-17
citations:
  retrieved: 2021-09-29
citations:
  retrieved: 2018-11-21
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  api version: v1
  served at: 2026-08-02T22:42:06.512919Z
  entity updated at: 2026-05-03T18:28:36.114423+00:00Z
  entity created at: 2026-05-03T14:43:28.983670+00:00Z