Patented
41industrial polymers, major — Introduction chemical compounds used in the manufacture of synthetic industrial materials. In the commercial production of plastics, elastomers, man made fibres, adhesives, and surface coatings, a tremendous variety of polymers are… …
42Scuba set — A scuba diver in usual sport diving gear A scuba set is an independent breathing set that provides a scuba diver with the breathing gas necessary to breathe underwater during scuba diving. It is much used for sport diving and some sorts of work… …
43Paper clip — A paper clip (or sometimes paperclip) is a device which holds several sheets of paper together by means of pressure: it leaves the paper intact and can be quickly and easily removed, unlike the staple, which will damage the paper unless removed… …
44Sewing machine — Elias Howe s lockstitch machine, invented 1845 A sewing machine is a textile machine used to stitch fabric, cards and other material together with thread. Sewing machines were invented during the first Industrial Revolution to decrease the amount …
45Frederick W. Lanchester — Infobox Engineer image size = 150px caption = PAGENAME name = PAGENAME nationality = English birth date = October 23, 1868 birth place = Lewisham, London death date = March 8, 1946 death place = education = spouse = parents = children =… …
46Truss bridge — for a single track railway, converted to pedestrian use and pipeline support Ancestor Beam bridge[ …
47Birt Acres — Infobox actor bgcolour = silver name = Birt Acres imagesize = 200px caption = birthdate = birth date|1854|7|23 location = USA Richmond, Virginia, height = deathdate = death date and age|1918|12|27|1854|7|23 deathplace = UK Whitechapel, London… …
48Simon Willard — Infobox Person name = Simon Willard image size = 150px caption = Simon Willard birth name = birth date = April 3, 1753 birth place = Grafton, Massachusetts death date = August 30, 1848 death place = Roxbury death cause = resting place = resting… …
49Henry Alonzo House — (April 23 1840 December 18 1930) was an American inventor who developed machinery and processes that have had a lasting impact on several industries.Early lifeHouse was born in Brooklyn, New York, the youngest son of Ezekiel House, an architect… …
50keyboard instrument — ▪ music Introduction any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… …
