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Patent
   D255904
Priority
Oct 20 1977
Filed
Oct 20 1977
Issued
Jul 15 1980
Expiry
Jul 15 1994
Inventors
Therrien, …
Assg.orig
Assg.curr
Entity
unknown
Referenced by
2
References
2
Maint.:
n/a
The ornamental design for a piano keyboard level adjusting bar, substantially as shown and described.

FIG. 1 is a side elevational view of a piano keyboard level adjusting bar showing my new design, the other side being substantially identical;

FIG. 2 is a top plan view thereof and,

FIG. 3 is a front elevational view thereof, the rear being substantially identical.
INVENTORS:

Therrien, Gilles

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
10937405, May 11 2020 Foldable piano keyboard
D711459, Mar 22 2011 General Mills Marketing, Inc Electric musical instrument
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
476766,
239726,
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