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• Balthis, J. H.; Signaigo, F. K.
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  Process for Producing Lustrous Cellulosic Products.
  U.S. Patent 2,563,637
  U.S. Patent 2,563,637
  August 22, 1946
  4 p.

• Balthis, J. H.; Signaigo, F. K.
  view article (1.0)

  Process for Producing Lustrous Cellulosic Products.
  E. I. du Pont de Nemours and Co., Wilmington, DE
  U.S. Patent 2,563,637
  U.S. Patent 2,563,637
  August 22, 1946
  4 p.