LandOfFree - US Patents - Listing for Mining or in situ disintegration of hard material

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Heckenhauer William G.

Inventor

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Hecla Mining Company

Corporate Assignee

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Hedlund Jan-Gunnar

Inventor

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Heers Robert G.

Inventor

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Heerssen Rolf

Inventor

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Hefelfinger Richard

Inventor

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Hegadorn Timothy Ennis

Inventor

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Heiderich Ernst

Inventor

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Heierli & Co.

Corporate Assignee

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Heimaster John W.

Inventor

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Heintzmannn Peter

Inventor

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Hellmuth Werner

Inventor

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Helsel Eric Paul

Inventor

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Helvenston Edward P.

Inventor

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Hemmer Walter

Inventor

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Hemphill Adley W.

Inventor

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Henderson Everett James

Inventor

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Henderson John Keller

Inventor

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Henkle, executrix by Eleanor J. Castanoli

Inventor

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Hennecke Peter Heinrich

Inventor

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