4. Measuring and testing
  5. Instrument proving or calibrating
  6. Fluid pressure

Christian Ludwig

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Focusing system for long focal length objectives

Patent

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Interchangeable lens for cameras, such as reflex cameras

Patent

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Lens mount with noise reducing means

Optics: motion pictures – With sound accompaniment – Housing and supports
Patent

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Method for setting and checking the flow in valves

Measuring and testing – Instrument proving or calibrating – Fluid pressure
Patent

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System and method for promoting and tracking physical...

Exercise devices – Having specific electrical feature – Monitors exercise parameter
Reexamination Certificate

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Profile ID: LFUS-PAI-P-293325

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