Chemical patents and allied patent problems

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050 0 ‡aTP 210 ‡bT45 1917
100 1 ‡aThomas, Edward, ‡d1877-
245 1 0 ‡aChemical patents and allied patent problems.
260 ‡aWashington, ‡bByrne, ‡c1917.
300 ‡a58 p. ‡c24 cm.
538 ‡aMode of access: Internet.
650 0 ‡aPatent laws and legislation ‡zUnited States.
650 0 ‡aChemicals ‡vPatents.
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