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Flushing cisterns
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Patent number 4,646,369
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Issue date Mar 3, 1987
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National Research Development Corporation
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Geoffrey J. Brown
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E03 - WATER SUPPLY SEWERAGE
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Flushing siphon
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Patent number 4,625,752
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Issue date Dec 2, 1986
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John A. George
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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3582997
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Patent number 3,582,997
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Issue date Jun 8, 1971
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E03 - WATER SUPPLY SEWERAGE
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3358295
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Patent number 3,358,295
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Issue date Dec 19, 1967
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E03 - WATER SUPPLY SEWERAGE
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2646061
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Patent number 2,646,061
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Issue date Jul 21, 1953
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F24 - HEATING RANGES VENTILATING
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2612903
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Patent number 2,612,903
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Issue date Oct 7, 1952
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E03 - WATER SUPPLY SEWERAGE
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2296055
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Patent number 2,296,055
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Issue date Sep 15, 1942
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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1752620
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Patent number 1,752,620
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Issue date Apr 1, 1930
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G01 - MEASURING TESTING
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1345383
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Patent number 1,345,383
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Issue date Jul 6, 1920
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G05 - CONTROLLING REGULATING
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1225691
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Patent number 1,225,691
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Issue date May 8, 1917
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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1059116
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Patent number 1,059,116
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Issue date Apr 15, 1913
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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897378
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Patent number 897,378
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Issue date Sep 1, 1908
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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753174
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Patent number 753,174
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Issue date Feb 23, 1904
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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692611
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Patent number 692,611
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Issue date Feb 4, 1902
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E03 - WATER SUPPLY SEWERAGE
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649170
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Patent number 649,170
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Issue date May 8, 1900
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E03 - WATER SUPPLY SEWERAGE
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615238
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Patent number 615,238
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Issue date Dec 6, 1898
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G01 - MEASURING TESTING
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564156
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Patent number 564,156
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Issue date Jul 14, 1896
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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552119
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Patent number 552,119
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Issue date Dec 31, 1895
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E03 - WATER SUPPLY SEWERAGE
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537968
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Patent number 537,968
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Issue date Apr 23, 1895
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B08 - CLEANING
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536150
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Patent number 536,150
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Issue date Mar 19, 1895
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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444310
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Patent number 444,310
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Issue date Jan 6, 1891
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E03 - WATER SUPPLY SEWERAGE
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401575
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Patent number 401,575
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Issue date Apr 16, 1889
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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381224
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Patent number 381,224
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Issue date Apr 17, 1888
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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358677
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Patent number 358,677
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Issue date Mar 1, 1887
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E03 - WATER SUPPLY SEWERAGE
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249134
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Patent number 249,134
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Issue date Nov 1, 1881
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G01 - MEASURING TESTING
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210965
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Patent number 210,965
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Issue date Dec 17, 1878
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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202586
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Patent number 202,586
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Issue date Apr 16, 1878
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F24 - HEATING RANGES VENTILATING