Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| D539442 | Decorative design block | 03/27/2007 |
| 7162839 | Non-slip material The invention provides a slip stopper which achieves a great slip stopping effect, and can be used for a location where a problem occurs if a through hole is opened therein. In a protruding portion that protrudes from the upper surface of a steel plate in the plate ... | 01/16/2007 |
| D499196 | Tile mosaic | 11/30/2004 |
| 4718562 | Vertical package display rack Disclosed is a vertical display rack for packages. One or more mounting members are removably secured to a support structure. Each of the mounting members includes one or more arms extending from the support structure for supporting a plurality of the pac... | 01/12/1988 |
| 4671028 | Intrinsically hinged load member An intrinsically hinged structural member is disclosed which can easily be bent, rolled or folded in one direction while exhibiting high resistance to bending, rolling or folding in the opposite direction. The general form of the structural member compris... | 06/09/1987 |
| 4628549 | Floatable sheet material and method of making A floatable on water, translucent laminated plastic sheet material having a plastic embossed film with a plurality of embossments dispersed thereon except at the longitudinal edges thereof. The embossments are spaced apart and separated by land areas and ... | 12/16/1986 |
| 4615448 | Display panel An integral display panel formed of wood composite material provided with a plurality of spaced parallel horizontally extending grooves having a modified T-shaped cross-section, and a substantially sheet-form insert mounted within each of said grooves, ea... | 10/07/1986 |
| 4497858 | Tile for an entrance mat A tile for use in constructing an entrance mat. The tile has a flat base and low walls surrounding the base for retaining water on the base. Scraper means are provided on the base for scraping snow, water and/or slush off the feet of people using the mat.... | 02/05/1985 |
| 4442827 | Solar heat collector A compact, self-contained solar heat collector is disclosed which is particularly suited for addition to new or existing structures in the form of window shutters, exterior siding, awnings, columnar elements and the like. The exterior glazing (32) of the ... | 04/17/1984 |
| 4431166 | Garbage can mat A garbage can mat which encloses a garbage can or cans and acts as a barrier for dogs to prevent them from knocking over the garbage can or cans. The mat includes modules which are snap-fastened together at their adjoining end portions to form an enclosur... | 02/14/1984 |
| 4128357 | Slab-elements for covering the ground A slab element for covering the ground is made e.g. of concrete and forms as a single piece. It has a head portion and a stem portion meeting at a notional meeting surface. The element is delimited by two opposite end faces of equal length joined by sides... | 12/05/1978 |
| 4080769 | Annular structures for the erection of buildings For the building of roomed structures there are provided two kinds of modular units which respectively form walls, and floors or ceilings. Two of each kind of unit can be bolted together to form an annular assembly. A plurality of annular assemblies can b... | 03/28/1978 |
