Complex sentence: 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.
Split into simpler sentences: 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.