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| Number | Title | Issue Date |
| 7373734 | Linear proportioner A linear proportioner including a logarithmic mechanism to be used for transferring linear dimensions from an existing drawing, picture or actual scene to a new drawing or artist medium. An elongated assembly provides two indicators (one fixed and one variable) as r... | 05/20/2008 |
| 7310884 | Adjustable golden section indicator and method for loci transfer An adjustable device to locate and transfer the positions of golden section points from a source image to a secondary surface, comprising a plurality of paired blades that are coupled to pivot at the golden section points that occur along the length of the blades an... | 12/25/2007 |
| 7082692 | Adjustable multifunction ruler An adjustable ruler includes two elongate ruler members and an adjustable clamping member. Each of the ruler members includes a longitudinal slot, outwardly facing channels along opposite sides of the slot, parallel longitudinal sides, and measuring indicia marked a... | 08/01/2006 |
| 7043849 | Multifunction caliper instrument for the arts A multifunction instrument comprising four movable parts, including a first leg 12, an identical second leg 14, a pointer arm 16, and a connecting arm 18. Pointer arm 16 and connecting arm 18 are permanently but pivotally co... | 05/16/2006 |
| 6854196 | Adjustable baluster spacer tool An adjustable spacer tool for spacing balusters includes an extendable pantograpic assembly having a first and second end and including evenly-spaced parallel uprights and X-shaped sets of cross-bars pivotally connected to one another. Each X-shaped set is pivotally... | 02/15/2005 |
| 5174040 | Multi-leg caliper with heart scale A multi-leg caliper with heart scale allowing analysis over a variable plurality of heart beats for arrhythmia is taught. Briefly stated, a plurality of parallel members are pivotally connected to a second set of parallel members thereby forming a lattice... | 12/29/1992 |
| 5154004 | Proportional divider A proportional divider is provided with two leg members connected by a slidable pivot assembly. The slidable pivot assembly is frictionally attached to each leg member by a shallow u-shaped member. The distal ends of the leg members taper to a point. Both... | 10/13/1992 |
| 4936022 | Multi-leg caliper with heart scale A multi-leg caliper with heart scale allowing analysis over a variable plurality of heart beats for arrhythmia is taught. Briefly stated, a plurality of parallel members are pivotally connected to a second set of parallel members thereby forming a lattice... | 06/26/1990 |
| 4866848 | Instrument for subdividing angles into halves, thirds or fifths A simple drawing instrument for the subdivision of angles into halves, thirds and fifths comprises two planar pieces connected at a pivot point. Each piece has three curved edges, being the external edge of the part and the two edges of a curved slot with... | 09/19/1989 |
| 4326339 | Device for locating center positions A device is provided for locating the center position of an object directly, without the need of measurement or mental computation. The device comprises a generally flat elongated frame having a center point marker and distance scales. Two pins are journa... | 04/27/1982 |
| 4270273 | Measuring instrument A measuring instrument, preferably for determining the mean arterial blood pressure from a graph containing values of systolic pressure and diastolic pressure. The instrument comprises a compass having a pair of outer legs and a single intermediate leg di... | 06/02/1981 |
