Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7249552 | Saw guide A guide for use with a cutting member, such as hand saws, that is easy to use, is readily portable and can be adjusted to permit cutting of precise compound angles on work pieces of various configurations. The guide mechanism comprises two angularly related members ... | 07/31/2007 |
| 5058285 | Template A template includes a reference panel for bringing the center of a figure to be drawn into exact alignment with the center of a previously drawn figure. The reference panel, when used in combination with a figure panel having figure holes, allows concentr... | 10/22/1991 |
| 4554746 | Self-locking-and-measuring ruler for computer-printout forms The present invention provides a self-locking-and-measuring, straight-edge apparatus designed to allow one to very accurately draw spaced parallel lines, particulary horizontal ones, the straight-edge being especially designed for ruling computer-printout... | 11/26/1985 |
| 4244105 | Polytrack digital scale A digital scaler for measuring and displaying a distance on a drawing surface comprising a first triangle with a verticle straight edge and a second triangle with a horizontal straight edge slightably engaged with the first triangle along the vertical str... | 01/13/1981 |
| 4167815 | Device for pre-ruling printing forms Improvements in devices for measuring, laying out and ruling keyline boards for printed materials; a device for pre-ruling artists' and printing boards including a baseboard adapted to receive a keyline board thereon having precisely positioned location p... | 09/18/1979 |
| 4106202 | Apparatus for indicating the angle of a drafting parallel Apparatus for use with a drafting board and a drafting parallel of the type including a straight edge suspended by cables on one surface of the board for parallel movement therealong, comprising means for releasably locking one end of the straight edge in... | 08/15/1978 |
| 4067112 | Cutting guide for custom mats This device for cutting mats for pictures and picture frames, consists primarily of a hinged straight edge secured to another straight edge, the combination having adjustable scale means for accurately measuring and cutting mats.... | 01/10/1978 |
| 4053987 | Multi-purpose drawing instrument A multi-purpose drawing instrument comprising a guide rod supported horizontally on upright end supports and slidably engaging a roller support on a slide disc such that the disc is slidable along the rod. A carriage is slidingly supported on the guide ro... | 10/18/1977 |
