Since this work was first published after 1922 with the prescribed copyright notice, it is unlikely that this work is public domain in the USA. However, it is in the public domain in Canada (where IMSLP is hosted), the EU, and in those countries where the copyright term is life+70 years or less.
|Genre Categories||; ; ;|
|Work Title||Sonata for Solo Clarinet|
|Alternative. Title||Sonate für Klarinette Solo|
|Opus/Catalogue NumberOp./Cat. No.||Op.110|
|I-Catalogue NumberI-Cat. No.||ISK 78|
|Composer Time PeriodComp. Period||Early 20th century|
|Piece Style||Early 20th century|
If it’s for clarinet in C, then it’s in E minor. Maybe it’s meant to be played at whatever transposition so long as all the notes (E below middle C to G 2.5 octaves above) fit in the instrument’s compass.