Originally German label, later Czech label.
Motto: Ultraphon spiegelt den Ton (in Czech: Ultraphon věrný tón)
The name Ultraphon first appeared in Heinrich J. Küchenmeister’s Heinrich J. Küchenmeister & Co. KG in 1925 and later with Deutsche Ultraphon Aktiengesellschaft (aka Duag). Since April 1929 Duag was under control of label Berlin-Amsterdam (aka Intraphoon). After Duag declared bankruptcy in 1931, the German catalog was acquired by Telefunken.
In 1932, the Czech label branch was bought by Ravitas, spol. s r.o., which had already been producing and distributing Ultraphon records in Czechoslovakia since 1929. In 1933, Ravitas was transformed into Ultraphon, akciová společnost pro průmysl a obchod gramofonový based in Prague. The company owned the rights to the Ultraphon (only in Czechoslovakia) and “Supraphon” trademarks (worldwide, except in the Netherlands and its colonies). In 1945, Ultraphon was nationalized in Czechoslovakia (Beneš decrees - 100/1945 Sb.) and incorporated into a new company, Gramofonové Závody, národní podnik, based in Prague. After that, a new label Supraphon U was created where the "U" stands for Ultraphon.
The Czech Ultraphon catalog consists of well over 3000 shellac records. It was incorporated into Supraphon after World War II, with many historical recordings eventually being transferred to tape and reissued on vinyl LPs until the late 1980s.
The recording dates of Ultraphon matrix numbers until 1932 are, as follows:
10000 - 10014 = ? Feb. 1929
10015 - 10084 = Mar. 1929
10085 - 10125 = April 1929
10129 - 10133 = May 1929
10134 - 10158 = Jun. 1929
10217 - 10243 = Jul.1929
10244 - 10308 = Aug. 1929
10309 - 10324 = Sep. 1929
10325 - 10388 = Oct. 1929
10423 - 10502 = Nov. 1929
10503 - 10581 = Dec. 1929
10582 - 10636 = Jan. 1930
10637 - 10705 = Feb. 1930
10706 - 10832 = Mar. 1930
10833 - 10883 = April 1930
10894 - 10977 = May 1930
10978 - 11041 = Jun. 1930
11042 - 11155 = Juli 1930
11156 - 15069 = Aug. 1930
15070 - 15213 = Sep. 1930
15214 - 15445 = Oct. 1930
15446 - 15754 = Nov. 1930
15875 - 15970 = Dec. 1930
15971 - 16085 = Jan. 1931
16086 - 16208 = Feb. 1931
16214 - 16373 = Mar. 1931
16374 - 16447 recorded March, April & June 1931
16449 - 16455 recorded March, April & June 1931
16456 - 16641 = April 1931
16706 - 16806 = May 1931
16807 - 16898 = Jun. 1931
16899 - 16970 = June & July 1931
17012 - 17067 = July 1931
17068 - 17100 = July & Aug. 1931
18000 - 18012 = Aug. 1931
18141 - 18166 = Nov. 1931
18169 - 18200 = Dec. 1931
18201 - 18204 = Jan. 1932
18205 - 18244 = Feb. 1932
Recorded by Telefunken but partially still released on the Ultraphon label:
18245 - 18287 = Mar. 1932
18288 - 18344 = April 1932
18345 - 18393 = May 1932