-
3138201
-
Patent number 3,138,201
-
Issue date Jun 23, 1964
-
F28 - HEAT EXCHANGE IN GENERAL
-
3073989
-
Patent number 3,073,989
-
Issue date Jan 15, 1963
-
H01 - BASIC ELECTRIC ELEMENTS
-
2667596
-
Patent number 2,667,596
-
Issue date Jan 26, 1954
-
H01 - BASIC ELECTRIC ELEMENTS
-
2599754
-
Patent number 2,599,754
-
Issue date Jun 10, 1952
-
H01 - BASIC ELECTRIC ELEMENTS
-
2558647
-
Patent number 2,558,647
-
Issue date Jun 26, 1951
-
H01 - BASIC ELECTRIC ELEMENTS
-
2380505
-
Patent number 2,380,505
-
Issue date Jul 31, 1945
-
H01 - BASIC ELECTRIC ELEMENTS
-
2338562
-
Patent number 2,338,562
-
Issue date Jan 4, 1944
-
H04 - ELECTRIC COMMUNICATION TECHNIQUE
-
2338036
-
Patent number 2,338,036
-
Issue date Dec 28, 1943
-
H01 - BASIC ELECTRIC ELEMENTS
-
2285551
-
Patent number 2,285,551
-
Issue date Jun 9, 1942
-
H04 - ELECTRIC COMMUNICATION TECHNIQUE
-
2246283
-
Patent number 2,246,283
-
Issue date Jun 17, 1941
-
H04 - ELECTRIC COMMUNICATION TECHNIQUE
-
2237681
-
Patent number 2,237,681
-
Issue date Apr 8, 1941
-
H01 - BASIC ELECTRIC ELEMENTS
-
2227015
-
Patent number 2,227,015
-
Issue date Dec 31, 1940
-
H04 - ELECTRIC COMMUNICATION TECHNIQUE
-
2214973
-
Patent number 2,214,973
-
Issue date Sep 17, 1940
-
H01 - BASIC ELECTRIC ELEMENTS
-
2178081
-
Patent number 2,178,081
-
Issue date Oct 31, 1939
-
H01 - BASIC ELECTRIC ELEMENTS
-
2162808
-
Patent number 2,162,808
-
Issue date Jun 20, 1939
-
H01 - BASIC ELECTRIC ELEMENTS
-
2163266
-
Patent number 2,163,266
-
Issue date Jun 20, 1939
-
H01 - BASIC ELECTRIC ELEMENTS
-
2149977
-
Patent number 2,149,977
-
Issue date Mar 7, 1939
-
H01 - BASIC ELECTRIC ELEMENTS
-
2146994
-
Patent number 2,146,994
-
Issue date Feb 14, 1939
-
H01 - BASIC ELECTRIC ELEMENTS
-
2141375
-
Patent number 2,141,375
-
Issue date Dec 27, 1938
-
H01 - BASIC ELECTRIC ELEMENTS
-
2091863
-
Patent number 2,091,863
-
Issue date Aug 31, 1937
-
H01 - BASIC ELECTRIC ELEMENTS
-
2045984
-
Patent number 2,045,984
-
Issue date Jun 30, 1936
-
H01 - BASIC ELECTRIC ELEMENTS
-
2013162
-
Patent number 2,013,162
-
Issue date Sep 3, 1935
-
H04 - ELECTRIC COMMUNICATION TECHNIQUE
-
1935650
-
Patent number 1,935,650
-
Issue date Nov 21, 1933
-
H04 - ELECTRIC COMMUNICATION TECHNIQUE