George F. Helfrich

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Aluminum alloy and article cast therefrom

Metal treatment – Stock – Age or precipitation hardened or strengthened
Reexamination Certificate

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Apparatus for exercising the muscles of the lumbar region of...

Exercise devices – User manipulated force resisting apparatus – component... – Utilizing resilient force resistance
Reexamination Certificate

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Automated generator of optimal models for the statistical...

Data processing: structural design – modeling – simulation – and em – Modeling by mathematical expression
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Automated personalized telephone management system

Telephonic communications – Call or terminal access alarm or control – At substation
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Automatically controlling the interaction of a medium with...

Gas and liquid contact apparatus – Fluid distribution – Pumping
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Profile ID: LFUS-PAI-P-2111918

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