-
2890866
-
Patent number 2,890,866
-
Issue date Jun 16, 1959
-
F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
-
2049720
-
Patent number 2,049,720
-
Issue date Aug 4, 1936
-
F28 - HEAT EXCHANGE IN GENERAL
-
1633511
-
Patent number 1,633,511
-
Issue date Jun 21, 1927
-
F24 - HEATING RANGES VENTILATING
-
1326534
-
Patent number 1,326,534
-
Issue date Dec 30, 1919
-
F28 - HEAT EXCHANGE IN GENERAL
-
589610
-
Patent number 589,610
-
Issue date Sep 7, 1897
-
F28 - HEAT EXCHANGE IN GENERAL
-
550002
-
Patent number 550,002
-
Issue date Nov 19, 1895
-
F28 - HEAT EXCHANGE IN GENERAL
-
458488
-
Patent number 458,488
-
Issue date Aug 25, 1891
-
F24 - HEATING RANGES VENTILATING
-
454967
-
Patent number 454,967
-
Issue date Jun 30, 1891
-
F28 - HEAT EXCHANGE IN GENERAL
-
399776
-
Patent number 399,776
-
Issue date Mar 19, 1889
-
F28 - HEAT EXCHANGE IN GENERAL
-
395280
-
Patent number 395,280
-
Issue date Dec 25, 1888
-
F28 - HEAT EXCHANGE IN GENERAL
-
382699
-
Patent number 382,699
-
Issue date May 15, 1888
-
F24 - HEATING RANGES VENTILATING
-
306396
-
Patent number 306,396
-
Issue date Oct 14, 1884
-
F28 - HEAT EXCHANGE IN GENERAL
-
164712
-
Patent number 164,712
-
Issue date Jun 22, 1875
-
F28 - HEAT EXCHANGE IN GENERAL
-
156934
-
Patent number 156,934
-
Issue date Nov 17, 1874
-
F28 - HEAT EXCHANGE IN GENERAL
-
143540
-
Patent number 143,540
-
Issue date Oct 7, 1873
-
F28 - HEAT EXCHANGE IN GENERAL
-
133506
-
Patent number 133,506
-
Issue date Nov 26, 1872
-
F28 - HEAT EXCHANGE IN GENERAL
-
116900
-
Patent number 116,900
-
Issue date Jul 11, 1871
-
F28 - HEAT EXCHANGE IN GENERAL
-
113969
-
Patent number 113,969
-
Issue date Apr 25, 1871
-
F28 - HEAT EXCHANGE IN GENERAL
-
102119
-
Patent number 102,119
-
Issue date Apr 19, 1870
-
F28 - HEAT EXCHANGE IN GENERAL
-
89698
-
Patent number 89,698
-
Issue date May 4, 1869
-
F28 - HEAT EXCHANGE IN GENERAL
-
69798
-
Patent number 69,798
-
Issue date Oct 15, 1867
-
F24 - HEATING RANGES VENTILATING
-
47489
-
Patent number 47,489
-
Issue date Apr 25, 1865
-
F28 - HEAT EXCHANGE IN GENERAL
-
46499
-
Patent number 46,499
-
Issue date Feb 21, 1865
-
F24 - HEATING RANGES VENTILATING
-
44170
-
Patent number 44,170
-
Issue date Sep 13, 1864
-
F28 - HEAT EXCHANGE IN GENERAL
-
43992
-
Patent number 43,992
-
Issue date Aug 30, 1864
-
F28 - HEAT EXCHANGE IN GENERAL
-
43794
-
Patent number 43,794
-
Issue date Aug 9, 1864
-
F28 - HEAT EXCHANGE IN GENERAL
-
38809
-
Patent number 38,809
-
Issue date Jun 9, 1863
-
F28 - HEAT EXCHANGE IN GENERAL