This work is likely not in the public domain in the US (due to first publication with the required notice after 1922, plus renewal or "restoration" under the GATT/TRIPS amendments), nor in the EU and those countries where the copyright term is life+70 years. However, it is public domain in Canada (where IMSLP is hosted) and in other countries (China, Japan, S. Korea) where the copyright term is life+50 years.
|Composition Year||1954 December 17|
|Genre Categories||; ; ;|
|Work Title||Piano Sonata No.1|
|Name Translations||Piano Sonata; Sonate pour piano de Martinů; Sonata para piano|
|Authorities||WorldCat; Wikipedia; VIAF: 182470559|
|Opus/Catalogue NumberOp./Cat. No.||H.350|
|I-Catalogue NumberI-Cat. No.||IBM 31|
|Year/Date of CompositionY/D of Comp.||1954 December 17|
|Average DurationAvg. Duration||20 minutes|
|Composer Time PeriodComp. Period||Modern|
|Piece Style||Early 20th century|
|External Links||Wikipedia article|
(PDF) (Article by Erik Entwistle)
Another source (Dusseldorf is from R. Simon's book...) has it premiered in 1957 in Brno by Eliska Nováková, and played the next day in recital by Serkin in New York.