U.S. Patent #2,277,840 – Contact System – File 3, 1942
File — Box: 5, Folder: 16
Dates
- Creation: 1942
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