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| Number | Title | Issue Date |
| 6969793 | Piano key finder and chord indicator An instructional device for use by music students is constructed as an outer sleeve having a slide member fitted within it. The outer sleeve has first and second sets of openings and is imprinted with a representation of a piano keyboard. The slide member has alphab... | 11/29/2005 |
| 6841724 | Method and system of studying music theory A method and system of teaching and/or studying music theory and for aiding the practice of musical instruments according to the integration of the color spectrum with notes of the circle of fifths and rearrangement of those notes into the musical chromatic scale. T... | 01/11/2005 |
| 6331668 | Method and device for musical reference A method and device to aid musicians interested in composition, improvisation, and music theory. Various embodiments provide interactive reference tools that organize musical concepts including chord harmonies, chord progressions, cord substitutions, mode... | 12/18/2001 |
| 5535659 | Transposition rule for musical theory A transposition rule for musical theory for the visual indication of the sequence of notes of musical scales and/or chords in the various keys of a tone system. The transposition rule includes an elongated base member which is provided with fixed scales, ... | 07/16/1996 |
| 5107744 | Music rule A music rule is disclosed for assistance in the identification of chord, scale and mode structure with respect to the (ivory) key structure of a piano. The scale has a scale body accommodating an interior sliding rule. The interior sliding rule includes t... | 04/28/1992 |
| 4620471 | Chord selector for keyboard musical instruments A music chart for determining the constituent tones of a plurality of chords and the chord name of a given series of tones is disclosed. The chart is comprised of a disc having at its outer circumference a plurality of spaced-apart chord names. Each chord... | 11/04/1986 |
| 4602550 | Ruler for composing or decomposing the chords for any polyphonic musical instrument The ruler for composing or decomposing the chords for polyphonic musical instruments is characterized in that it comprises: ruler slides (A,B,C,D,E,F,P,Q) movable with respect to each other in a given direction and each provided with inscriptions relative... | 07/29/1986 |
| 4470334 | Musical instrument A musical instrument having a housing. A well is formed in one surface of the housing and adapted to receive a card. A slide is mounted on the housing for movement across the surface of the card. The card containing printed indicia, each of which represen... | 09/11/1984 |
| 4444083 | Keyboard instrument, especially a piano or similar instrument Keyboard instrument, in particular a piano or similar instrument that has keys and that can be used in conjunction with aids to learning in the form of templates, characterized in that, of the white keys (long keys 2) that form the C-major scale, the widt... | 04/24/1984 |
| 4404886 | Note reading octave isolator A musical teaching and playing aid has a sheath with a front panel defining spaced octaves of a keyboard instrument keyboard with slits just above the keys for the insertion of insert cards each of which is identified as to the octave above which it will ... | 09/20/1983 |
| 4361070 | Method and apparatus for music instruction on a barred or keyboard instrument A method and apparatus for teaching the relationship between the conventional musical staff and the tone-producing elements or keys of a barred or keyboard type instrument. The apparatus includes an elongated base member having a planar surface on which a... | 11/30/1982 |
| 4320690 | Musical structural integrator The present invention integrates the entire body of musical knowledge relating to key signatures, basic chord structure, the logical progression of chords within a key signature according to the cycle of fourths, identification of the root tone both of sc... | 03/23/1982 |
