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| Number | Title | Issue Date |
| 7174645 | Method for designing of aproximate elliptical structure and the same A method for designing an elliptical structure with an outline of an approximate elliptic curve, which is generated by connecting circular segments to one another, and an elliptical structure created on said method. A first fixed point is established outside the ell... | 02/13/2007 |
| 4790222 | Apparatus for cutting various forms out of a picture frame mat or the like A device for cutting oval or circle shaped forms, as well as irregular or scalloped variations thereof, in picture frame mats or the like. It consists of a cutting unit releasably securable both to a stationary arm or a reciprocating arm. When the cutting... | 12/13/1988 |
| 4688331 | Ellipsograph The crank guide rod mechanism for performing nearly rectilinear motion is formed by using the mathematical method from which is designed the ellipsograph of the hidden cross-groove principle employing two points of support for the suspension-extension sup... | 08/25/1987 |
| 4407074 | Apparatus for cutting and/or scribing circles and ovals A horizontal rotary table is provided and a mounting arm is supported above the table and generally parallels the latter. The arm extends along a path paralleling an axis of rotation of the table and an upright shaft is journalled from the mounting arm fo... | 10/04/1983 |
| 4226022 | Ellipsograph An ellipsograph comprises an inner toothed horizontal ring gear serving as a support. A diametrically disposed main seat bar is mounted inside of the ring gear and rotatable about the center. A vertical shaft is mounted on the main seat with a revolving a... | 10/07/1980 |
| 3958471 | Method of and apparatus for manufacturing workpieces having polygonyl inner and outer contours Methodwise this disclosure relates to the manufacture of workpieces having polygonal inner or outer contours based upon radii of predetermined inner and outer circles with n being the number of angles of the desired polygon, the method including the steps... | 05/25/1976 |
