"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
Location Status Access Closed stores