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patent pending

  1. Clarinet
    So I started to clean up my Cavalier metal clarinet this morning and noticed it has a tiny "PAT. PEN'G." stamped on the body by the F#/C# key cup, directly between the posts. Does anyone know what patent that is for? Also, what is the difference between a 92N and the 98N? By the SN mine is a 92N.
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