Nernst lamp patent dates

Nernst Lamp Company, Pittsburgh

Label with patent information

Label with patent information inside Nernst lamp (c. 1903)

PATENTED
April 25, '99.
June  26, '00.
 
July 10, '00.
Nov. 20, '00.
Mar. 12, '01.
Oct.  8, '01.
 
Oct. 29, '01.
Jan.  7, '02.
Mar. 25, '02.
Nov.  4, '02.
 
Dec. 30, '02.
Mar. 17, '03.
May  19, '03.
June  2, '03.
 OTHER
PATENTS
PENDING

Walther Nernst homepage

Revised 2004-07-02