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Broadband Directional Coupler, Carl G. Sontheimer and Raymond E. Fredrick, Adams-Russell Co. Inc. US Pat No. 3426298, Feb 4th, 1969. Filed Apr 19 1966. |
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References Cited: USP 1454011 Blackwell USP 2734169 Douma USP 3048798 Simons . |
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Broadband Directional Coupler, Carl G. Sontheimer and Raymond E. Fredrick, Adams-Russell Co. Inc. US Pat No. 3426298, Feb 4th, 1969. Filed Apr 19 1966. |
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References Cited: USP 1454011 Blackwell USP 2734169 Douma USP 3048798 Simons . |
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