$20.00 – $85.00
Patent for the counter weight for balancing the trombone while playing.
Gebr. Alexander’s patent. First fully constructed double horn with completely independent F and B flat sides.
Invention by Henri Selmar – founding member of French Selmar Company. Increased the lower range of instrument.
William S Haynes’ patent to correct a flaw that had troubled flute-makers up until that time.
Invention by Henri Selmar – founding member of French Selmar Company. Patent relates to manufacture of valves.