# US 10,311,837 B1 · Enhanced string instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,311,837 B1 - Document ID: US10311837B1 - Status: Granted - Kind: B1 - Application number: 15/997,228 - Filed: 2018-06-04 - Granted: 2019-06-04 - Earliest claimed: 2017-06-02 - Assignees: Zrm Sound, LLC - Applicants: ZRM Sound, LLC - Inventors: Peter Harold Zaret; Dale K. Rodgers - Web page: https://patentgrep.com/patent/US10311837B1 ## CPC - G10D 1/08: Guitars - G10D 3/02: Resonating means, horns or diaphragms - G10D 3/06: Necks; Fingerboards, e.g. fret boards - G10D: STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR (organs, harmoniums or similar wind musical instruments with associated blowing apparatus G10B; pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards G10C; automatic musical instruments G10F; electrophonic musical instruments in which tones are generated by electromechanical means G10H) ## Abstract An acoustic musical string instrument, such as a guitar, and related methods include one or more of 1) slanted sound posts extending between the front sound board and a lateral brace on the back plate of the guitar; 2) longitudinal braces extending between a lateral brace and a side wall of the guitar, 3) longitudinal blocks extending between adjacent lateral braces of the guitar, between a lateral brace and the neck block, or between a lateral brace and the tail block; and 4) a metal covered bridge plate. ## Claims ### Claim 1 An musical string instrument comprising: a hollow body defining an interior, a tail end, and a neck end opposite from the tail end, and including a sound board, a back plate, and a side wall extending between the sound board and the back plate, wherein the sound board includes lateral braces arranged in the interior and contacting an interior surface of the back plate; a bridge plate arrange on an interior surface of the sound board; and slanted sound posts arranged in the interior, the slanted sound posts each defining a first end and a second end distal from the first end, the first end contacting the sound board and the side wall, and the second end contacting the back plate and one of the lateral braces. ### Claim 2 (depends on 1) The musical string instrument according to claim 1, wherein: the lateral braces include a first lateral brace and a second lateral brace, the first lateral brace is arranged closest to the neck end, and the second lateral brace is arranged closest to the tail end, the slanted sound posts include a first slanted sound post, a second slanted sound post, a third slanted sound post, and a fourth slanted sound post, the first and second slanted sound posts each contact the first lateral brace, and the third and fourth slanted sound posts each contact the second lateral brace. ### Claim 3 (depends on 2) The musical string instrument according to claim 2, wherein: the lateral braces further include a third lateral brace arranged between the first lateral brace and the second lateral brace, the slanted sound posts further include a fifth slanted sound post and a sixth slanted sound post, and the fifth and sixth slanted sound posts each contact the third lateral brace. ### Claim 4 (depends on 3) The musical string instrument according to claim 3, further including longitudinal braces arranged in the interior, and each contacting adjacent lateral braces, or one of the lateral braces and the side wall. ### Claim 5 (depends on 4) The musical string instrument according to claim 4, wherein: the longitudinal braces include a first longitudinal brace, a second longitudinal brace, a third longitudinal brace, a fourth longitudinal brace, a fifth longitudinal brace, a sixth longitudinal brace, a seventh longitudinal brace, an eighth longitudinal brace, a ninth longitudinal brace, and a tenth longitudinal brace, the first and second longitudinal braces each contact a portion of the side wall at the neck end and the first lateral brace, the third and fourth longitudinal braces each contact a portion of the side wall at the tail end and the second lateral brace, the fifth and sixth longitudinal braces each contact the first lateral brace and the fourth lateral brace, the seventh and eighth longitudinal braces each contact the third lateral brace and the fourth lateral brace, and the ninth and tenth longitudinal braces each contact the second lateral brace and the third lateral brace. ### Claim 6 (depends on 1) The musical string instrument according to claim 1, further including: a neck block arranged in the interior and contacting an interior surface of the side wall at the neck end, a tail block arranged in the interior and contacting a portion of the side wall at the tail end, longitudinal blocks arranged in the interior and on the back plate, and contacting two adjacent lateral braces, contacting one of the lateral braces and the neck block, or contacting one of the lateral braces and the tail block. ### Claim 7 (depends on 1) The musical string instrument according to claim 1, further including a flat metal sheet arranged in the interior, wherein a major surface of the flat metal sheet is mated to a flat interior surface of the bridge plate. ### Claim 8 (depends on 5) The musical string instrument according to claim 5, wherein: the first, third, fifth, seven, and ninth longitudinal braces are arranged in a straight line extending in a longitudinal direction between the neck end and the tail end; and the second, fourth, sixth, eighth, and tenth longitudinal braces are arranged in a straight line extending in the longitudinal direction. ### Claim 9 (depends on 8) The musical string instrument according to claim 8, further including: a neck block arranged in the interior and contacting an interior surface of the side wall at the neck end, a tail block arranged in the interior and contacting a portion of the side wall at the tail end, longitudinal blocks arranged in the interior and on the back plate, and contacting two adjacent lateral braces, contacting the first lateral brace and the neck block, or contacting the second lateral brace and the tail block. ### Claim 10 (depends on 9) The musical string instrument according to claim 9, further including a flat metal sheet arranged in the interior, wherein a surface of the flat metal sheet is mated to a flat interior surface of the bridge plate. ### Claim 11 A method of enhancing sound produced by a musical string instrument, comprising: providing a musical string instrument including: a hollow body defining an interior, a tail end, and a neck end opposite from the tail end, and including a sound board, a back plate, and a side wall extending between the sound board and the back plate, the sound board including lateral braces arranged in the interior and contacting an interior surface of the back plate; and a bridge plate arrange on an interior surface of the sound board; providing slanted sound posts, each defining a first end and a second end distal from the first end, arranging the slanted sound posts in the interior such that for each of the slanted sound posts, the first end contacts the sound board and the side wall, and the second end contacts the back plate and one of the lateral braces. ### Claim 12 (depends on 11) The method according to claim 11, wherein: the lateral braces include a first lateral brace and a second lateral brace, the first lateral brace is arranged closest to the neck end, and the second lateral brace is arranged closest to the tail end, the slanted sound posts include a first slanted sound post, a second slanted sound post, a third slanted sound post, and a fourth slanted sound post, the first and second slanted sound posts each contact the first lateral brace, and the third and fourth slanted sound posts each contact the second lateral brace. ### Claim 13 (depends on 12) The method according to claim 12, wherein: the lateral braces further include a third lateral brace arranged between the first lateral brace and the second lateral brace, the slanted sound posts further include a fifth slanted sound post and a sixth slanted sound post, and the fifth and sixth slanted sound posts each contact the third lateral brace. ### Claim 14 (depends on 13) The method according to claim 13, further comprising arranging longitudinal braces in the interior, such that the longitudinal braces each contact adjacent lateral braces, or one of the lateral braces and the side wall. ### Claim 15 (depends on 14) The method according to claim 14, wherein: the longitudinal braces include a first longitudinal brace, a second longitudinal brace, a third longitudinal brace, a fourth longitudinal brace, a fifth longitudinal brace, a sixth longitudinal brace, a seventh longitudinal brace, an eighth longitudinal brace, a ninth longitudinal brace, and a tenth longitudinal brace, the first and second longitudinal braces each contact a portion of the side wall at the neck end and the first lateral brace, the third and fourth longitudinal braces each contact a portion of the side wall at the tail end and the second lateral brace, the fifth and sixth longitudinal braces each contact the first lateral brace and the fourth lateral brace, the seventh and eighth longitudinal braces each contact the third lateral brace and the fourth lateral brace, and the ninth and tenth longitudinal braces each contact the second lateral brace and the third lateral brace. ### Claim 16 (depends on 11) The method according to claim 11, wherein: the musical string instrument further comprises: a neck block arranged in the interior and contacting an interior surface of the side wall at the neck end, and a tail block arranged in the interior and contacting a portion of the side wall at the tail end; and the method further comprises arranging longitudinal blocks in the interior and on the back plate, such that two of the longitudinal blocks each contact two adjacent lateral braces, one of the longitudinal blocks contacts one of the lateral braces and the neck block, and another one of the longitudinal blocks contacts another one of the lateral braces and the tail block. ### Claim 17 (depends on 11) The method according to claim 11, further comprising arranging a flat metal sheet in the interior such that a major flat surface of the flat metal sheet is mated to a flat interior surface of the bridge plate. ### Claim 18 (depends on 15) The method according to claim 15, wherein: the first, third, fifth, seven, and ninth are arranged in a straight line extending in a longitudinal direction between the neck end and the tail end, and the second, fourth, sixth, eighth, and tenth longitudinal braces are arranged in a straight line extending in the longitudinal direction. ### Claim 19 (depends on 18) The method according to claim 18, wherein: the musical string instrument further comprises: a neck block arranged in the interior and contacting an interior surface of the side wall at the neck end, and a tail block arranged in the interior and contacting a portion of the side wall at the tail end; and the method further comprises arranging longitudinal blocks in the interior and on the back plate, such that two of the longitudinal blocks each contact two adjacent lateral braces, one of the longitudinal blocks contacts the first lateral brace and the neck block, and another one of the longitudinal blocks contacts the second lateral brace and the tail block. ### Claim 20 (depends on 19) The method according to claim 19, further comprising arranging a flat metal sheet in the interior such that a major surface of the flat metal sheet is mated to a flat interior surface of the bridge plate.