U.S. Patent #2,228,383 – Tobacco Smoke Filtering – File 1, 1936-1941, undated
File — Box: 4, Folder: 22
Dates
- Creation: 1936-1941, undated
Repository Details
Part of the Science History Institute Archives Repository
Contact:
315 Chestnut Street
Philadelphia PA 19106 United States
215.873.8265
215.873.5265 (Fax)
reference@sciencehistory.org
315 Chestnut Street
Philadelphia PA 19106 United States
215.873.8265
215.873.5265 (Fax)
reference@sciencehistory.org