The English version was invented in 1829 (with a patent for an improved version filed in 1844) by Sir Charles Wheatstone; the German version was announced in 1834 by Carl Friedrich Uhlig.
The German version was announced in 1834 by Carl Friedrich Uhlig. The English version was invented in 1829 by Sir Charles Wheatstone and a patent for an improved version was filed by him in 1844.
The English version was invented in 1829 by Sir Charles Wheatstone and a patent for an improved version was filed by him in 1844. The German version was announced in 1834 by Carl Friedrich Uhlig.
The English version was invented in 1829 by Sir Charles Wheatstone and a patent for an improved version was filed by him in 1844. The German version was announced in 1834 by Carl Friedrich Uhlig.