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                        2688098
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                                    Patent number 2,688,098
                                
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                                    Issue date Aug 31, 1954
                                
 
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                        2069850
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                                    Patent number 2,069,850
                                
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                                    Issue date Feb 9, 1937
                                
 
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                        2056370
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                                    Patent number 2,056,370
                                
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                                    Issue date Oct 6, 1936
                                
 
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                        1914935
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                                    Patent number 1,914,935
                                
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                                    Issue date Jun 20, 1933
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1902200
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                                    Patent number 1,902,200
                                
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                                    Issue date Mar 21, 1933
                                
 
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                        1859904
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                                    Patent number 1,859,904
                                
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                                    Issue date May 24, 1932
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1853282
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                                    Patent number 1,853,282
                                
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                                    Issue date Apr 12, 1932
                                
 
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                        1839270
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                                    Patent number 1,839,270
                                
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                                    Issue date Jan 5, 1932
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1839552
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                                    Patent number 1,839,552
                                
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                                    Issue date Jan 5, 1932
                                
 
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                        1817329
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                                    Patent number 1,817,329
                                
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                                    Issue date Aug 4, 1931
                                
 
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                        1815213
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                                    Patent number 1,815,213
                                
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                                    Issue date Jul 21, 1931
                                
 
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                        1752826
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                                    Patent number 1,752,826
                                
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                                    Issue date Apr 1, 1930
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1661604
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                                    Patent number 1,661,604
                                
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                                    Issue date Mar 6, 1928
                                
 
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                        1655184
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                                    Patent number 1,655,184
                                
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                                    Issue date Jan 3, 1928
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1645599
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                                    Patent number 1,645,599
                                
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                                    Issue date Oct 18, 1927
                                
 
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                        1645899
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                                    Patent number 1,645,899
                                
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                                    Issue date Oct 18, 1927
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1644350
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                                    Patent number 1,644,350
                                
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                                    Issue date Oct 4, 1927
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1635113
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                                    Patent number 1,635,113
                                
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                                    Issue date Jul 5, 1927
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1626338
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                                    Patent number 1,626,338
                                
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                                    Issue date Apr 26, 1927
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1620684
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                                    Patent number 1,620,684
                                
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                                    Issue date Mar 15, 1927
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1615912
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                                    Patent number 1,615,912
                                
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                                    Issue date Feb 1, 1927
                                
 
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                        1614825
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                                    Patent number 1,614,825
                                
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                                    Issue date Jan 18, 1927
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1570834
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                                    Patent number 1,570,834
                                
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                                    Issue date Jan 26, 1926
                                
 
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                        1533794
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                                    Patent number 1,533,794
                                
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                                    Issue date Apr 14, 1925
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
 
 
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                        1505209
                                - 
                                    Patent number 1,505,209
                                
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                                    Issue date Aug 19, 1924
                                
 
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                                         A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE