"Letters Patent of Ivan Alexandrovich Parfentjev for Improvement in Methods for Purification of Antitoxin and the Like" (US Patent Office)

Date:
1937
Reference:
WF/L/06/114
Part of:
Wellcome Foundation Ltd
  • Archives and manuscripts

About this work

Description

Department of Commerce, US Patent Office. A "true copy" with blue ribbon and red seal. Patent (2,065,196) granted 22 December, 1936. Copy dated 24 March, 1937.

Publication/Creation

1937

Physical description

1 file

Copyright note

Copyright assigned to the Wellcome Trust

Where to find it

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