Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 5017041 | Leaching system conduit with high rigidity joint A conduit for dispersing or gathering liquids in the earth has an arch shape cross section and alternating peak and valley corrugations along its length. A more rigid shiplap joint is formed between mating conduits by means of cantilever legs extending fr... | 05/21/1991 |
| 4824287 | Septic system In a septic system for handling household waste water, used vehicle tires are employed to form the septic tank and the leaching galleries. Vehicle tires sealed to one another and in combination with end caps provide a watertight and lighttight enclosure i... | 04/25/1989 |
| 4799822 | Profile elements, particularly for supply and/or removal of substances from environmental and/or flow material Profile elements are provided for enriching or purifying substances that have different states, i.e., an environmental material and a fluid material. The profile elements for supply or removal of fluid substances to or from granulated, fibrous, or soil-li... | 01/24/1989 |
| 4759661 | Leaching system conduit A thermoplastic device for leaching sewage system effluent into the earth has the shape of an inverted trough. Its sidewalls have slot shaped perforations; above each slot is a lip; beneath each slot is one or more protuberances, preferably rectanguloid i... | 07/26/1988 |
| 4588325 | Modular rock replacing drain field apparatus Apparatus and a method for constructing a sewage drain field without a rock media. The drain field includes a plurality of lengthwise connected drain pipes suspended above the trench bottom within a channel formed by a plurality of elongated mesh-like cha... | 05/13/1986 |
| 4578189 | Sludge settling plant Two settling tanks are arranged one beside the other and are separated by a walk-in corridor. The settling tanks are defined by four longitudinal walls, one end wall, and two ramps, which are disposed opposite said end wall. Two additional tanks are provi... | 03/25/1986 |
| 4538141 | Water detection subassembly and method of forming same, for computer processing centers The present invention relates to a water detection subassembly and method for forming same, for use in association with water detection system operating within a digital computing center. The subassembly includes a perforated protective shield fitted abou... | 08/27/1985 |
| 4313692 | Septic tank drainage conduit structures This invention is in regard to septic tank drainage conduit structures, including an open-sided conduit structure for installation in clay type soil conditions and a U-shaped conduit structure for use in loose or sandy soil conditions. Each conduit struct... | 02/02/1982 |
| 4192628 | Flow distributor for leaching fields A distributor unit for use in leaching fields comprises a hollow open-bottomed concrete structure having a top wall and side and end walls defining a central cavity and which, in use, protects a sand bed into which effluent material from a septic tank can... | 03/11/1980 |
