Skip to main content

Downs Cell - United States Patent #1,501,756, 1924

 File — Box: 3, Folder: 15

Dates

  • Creation: 1924

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)