4. Fluid sprinkling, spraying, and diffusing
  5. Rigid fluid confining distributor
  6. Fluidic oscillator

Ludger Woste

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Device to aid the orientation of blind and partially sighted...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Nozzle for forming a free jet stream of a liquid, and its method

Fluid sprinkling – spraying – and diffusing – Rigid fluid confining distributor – Fluidic oscillator
Patent

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Orientation aid for the blind and the visually disabled

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1185337

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