U.S. Patent #3,216,931 - Method and Means for Cleaning Impurities from Water Treating Agents (Photocopy), 1965
File — Box: 2, Folder: 30
Dates
- Creation: 1965
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