The case of the issuance of a 10-year privilege of the piano master German Lichtental for a musical instrument invented by him w...

The case of the issuance of a 10-year privilege of the piano master German Lichtental for a musical instrument invented by him with transverse strings- "imperial".N.15/III.; V.U 16/IV.1847/Department of State Economy.- 1847. -10 l .. - (Department of state savings of the State Council. Inventory No. 3. 1847).-Film..I. Department of State Economy ..Electronic copy source: RGIAOriginal storage location: RGIA f.1152 op.3 1847 d.60