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Practical
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1961 1st practical sea water conversion plant - Freeport, Texas
1949 1st practical rectangular TV tube announced-Toledo, Oh 1934 Test of practical radar apparatus made by Rudolf Kuhnold in Germany 1901 Allen B DuMont, inventor, perfected coml practical cathode ray tube 1898 1st practical submarine 1st submerges, New York City (for 1 hour 40 minutes) 1876 Daniel Stillson (Mass) patents 1st practical pipe wrench 1853 1st practical fire engine (horse-drawn) in U.S. enters service 1839 Details of Louis Daguerre's 1st practical photographic process are released in Paris 1831 1st practical U.S. coal-burning locomotive makes 1st trial run, Pennsylvania 1811 Issac Merrit Singer, inventor, 1st practical home sewing machine 1809 1st practical U.S. railroad track (wooden, for horse-drawn cars), Philadelphia 1808 1st practical typewriter finished by Italian Pellegrini Turri |
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