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 |
| 4711598 | Beach erosion control device A concrete module for at least partial submergence in the surf to dissipate the energy of wave action and to promote the deposition of beach-restoring sand and pebbles comprises a series of passages which converge toward the shore-facing side of the modul... | 12/08/1987 |
| 4629360 | Retaining wall system Each disc of a plurality of strings of concrete discs is pinned at opposite edges to a connecting link, a link between adjacent discs to form a chain. Alternate discs in the string lie substantially in the same plane, adjacent discs lying in intersecting ... | 12/16/1986 |
| 4594206 | Concrete structures for use in shore protection and/or wave control and method of making same Concrete structures consist of fabric containers which are filled with concrete through an opening in the top thereof while the top of the container is suspended from a portable support frame placed over the container. The support frame supports the conta... | 06/10/1986 |
| 4498805 | Breakwater module and means for protecting a shoreline therewith A concrete breakwater module for use with like modules positioned side-by-side in a line along or offshore from a beach or bluff for preventing erosion due to wave action and for reversing previous erosion. Each module has a single, large, upwardly concav... | 02/12/1985 |
| 4439058 | Asymmetric seaweeds An artificial seaweed, or "asymmetric seaweed", system for preventing shoreline erosion and/or causing sand accretion on beaches under wave action.... | 03/27/1984 |
| 4367978 | Device for preventing beach erosion An off-shore reef-like structure for preventing beach erosion. The structure comprises a string of prism-shaped modules placed in side-by-side relation in the surf area along a line defined by a sand bar, for example, where waves normally break. Each modu... | 01/11/1983 |
| 4341489 | Offshore reef An offshore reef assembly having rows of reef members of concrete or similar material with the configuration of each of the reef members providing inclined side faces arranged in grooves and ribs. The reef members may be formed by stacking blocks in the f... | 07/27/1982 |
| 4255066 | Arrangement for concentrating sea waves An arrangement for concentrating sea waves, includes a grid-like structure of stopping and/or delaying elements adapted to influence the amplitude and/or phase of the waves and located in such positions in the water that the elements in interaction with t... | 03/10/1981 |
| 4231680 | Breakwaters In a breakwater which comprises a back wall, and at least one front wall pierced with holes to break up the impact of an incident wave, the improvements are proposed of providing a sloping back wall; of providing convex-concave indentations on the back wa... | 11/04/1980 |
| 4074497 | Underwater trusses for breakwater structure Hollow web members are engaged at the ends thereof with joint members which are provided with holes for holding the end of the web members. The hollow members are provided at an intermediate portion thereof with a flange extending in perpendicular to the ... | 02/21/1978 |
| 3966172 | Lightweight fence for protection against airborne snow, sand or the like An easily transportable or shiftable fence for use in protecting areas against wind-blown snow, sand or the like, and comprises a plurality of pliant, deformable or resilient strips mounted upon a plurality of A-frame members.... | 06/29/1976 |
