# US 5,707,081 A · Alphanumeric quick symbol guide > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,707,081 A - Document ID: US5707081A - Status: Granted - Kind: A - Application number: 08/645,232 - Filed: 1996-05-13 - Granted: 1998-01-13 - Earliest claimed: 1994-08-26 - Inventors: Roberto F. Luna - Web page: https://patentgrep.com/patent/US5707081A ## CPC - G09B 11/04: Guide sheets or plates; Tracing charts (templets for drawing purposes B43L13/20) - G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B) ## Abstract A symbol guide comprising a sheet and at least one pattern located on said sheet, the at least one pattern including two spaced apart substantially horizontal lines, two spaced apart substantially parallel lines positioned so that the substantially horizontal lines are located between the substantially parallel lines or extensions thereof; two substantially diagonally extending lines which cross each other in the space defined by the substantially horizontal lines, the substantially parallel lines and extensions thereof; and two substantially semi-circular curves facing each other and located within the space defined by the substantially horizontal lines, the substantially parallel lines and extensions thereof. ## Claims ### Claim 1 A symbol guide comprising: a sheet; and at least one pattern located on said sheet, said at least one pattern including two spaced apart substantially horizontal lines, two spaced apart substantially parallel lines positioned so that said substantially horizontal lines are located between said substantially parallel lines or extensions thereof; two substantially diagonally extending lines which cross each other in the space defined by the substantially horizontal lines, the substantially parallel lines and extensions thereof; and two substantially semi-circular curves facing each other and located within the space defined by the substantially horizontal lines, the substantially parallel lines and extensions thereof. ### Claim 2 (depends on 1) The symbol guide of claim 1 wherein said at least one pattern has a length defined by the distance between said two spaced apart substantially horizontal lines, and said two substantially semi-circular curves are located near opposing ends of the length. ### Claim 3 (depends on 1) The symbol guide of claim 1 wherein said substantially parallel lines are substantially vertical. ### Claim 4 (depends on 1) The symbol guide of claim 1 which further comprises a third substantially horizontal line substantially equidistantly spaced apart from each of said two substantially horizontal lines. ### Claim 5 (depends on 1) The symbol guide of claim 1 wherein at least one of said lines and said curves is solid. ### Claim 6 (depends on 1) The symbol guide of claim 1 wherein a plurality of said patterns are located on said sheet with each said pattern being spaced apart from the other pattern or patterns. ### Claim 7 (depends on 1) The symbol guide of claim 1 which includes a substantially horizontal array of at least three of said patterns. ### Claim 8 (depends on 1) The symbol guide of claim 1 which includes a substantially vertical array of at least three of said patterns. ### Claim 9 (depends on 1) The symbol guide of claim 1 wherein said sheet is a piece of paper. ### Claim 10 (depends on 1) The symbol guide of claim 1 wherein said sheet is a poster board. ### Claim 11 (depends on 1) The symbol guide of claim 1 wherein said sheet is a sign board. ### Claim 12 (depends on 1) The symbol guide of claim 1 wherein said sheet is a thin piece of polystyrene material. ### Claim 13 (depends on 1) The symbol guide of claim 1 wherein said sheet is a thin piece of plastic material. ### Claim 14 (depends on 1) The symbol guide of claim 1 wherein said sheet is a bumper sticker. ### Claim 15 (depends on 1) The symbol guide of claim 1 wherein said sheet is any interior/exterior sign board used for display purposes. ### Claim 16 A sheet comprising a plurality of spaced apart patterns each comprising first and second rectangles having a common interface, said first rectangle including a first group of lines and at least one first curve and said second rectangle including a second group of lines and at least one second curve, said second group being the mirror image of said first group and said at least one second curve being the mirror image of said at least one first curve. ### Claim 17 A symbol guide comprising: a sheet; and a plurality of spaced apart substantially identical patterns located on said sheet each comprising a plurality of lines and curves adapted to provide a human user sufficient guidance to produce symbols selected from the group consisting of letters of the alphabet and single digit numbers having substantial uniformity in symbol height and symbol spacing. ### Claim 18 (depends on 17) The symbol guide of claim 17 which includes a substantially horizontal array of at least three of said substantially identical patterns. ### Claim 19 (depends on 18) The symbol guide of claim 18 which includes a substantially vertical array of at least three of said substantially identical patterns. ### Claim 20 (depends on 17) The symbol guide of claim 17 wherein the spaces on said sheet between said substantially identical patterns are substantially blank.