Luminous-Lint - for collectors and connoisseurs of fine photography
HOME  BACK>>> Subscriptions <<< | Testimonials | Login |

Home > Contents > Visual indexes > William A. Pratt

 
  
Standard
  
  
William A. Pratt 
Improvement in Coloring Daguerreotype-Pictues [US Letters Patent No. 4,423] 
1846, 14 March 
  
Patent 
US Patent Office 
 
LL/99287 
  
(Alan Griffiths, 29 April 2020) I'm indebted to Michael Lehr for bringing this patent to my attention. 
 

 
  
 
  
HOME  BACK>>> Subscriptions <<< | Testimonials | Login |
 Facebook LuminousLint 
 Twitter @LuminousLint