Patent #2,232,211 - Automatic Voltage and pH Indicators, 1932-1941
File — Box: 52, Folder: 15-17
Dates
- Creation: 1932-1941
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