4. Winding, tensioning, or guiding
  5. Coil holder or support
  6. Spool or core

Stephen P. Birkeland

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Chemical container

Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent

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Film supply cassette for camera processor

Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent

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Semiconductive and sensitized photoconductive compositions

Gas separation: apparatus – Magnetic separating means
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Semiconductive and sensitized photoconductive compositions

Gas separation: apparatus – Magnetic separating means
Patent

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Semiconductive and sensitized photoconductive compositions

Compositions – Electrically conductive or emissive compositions
Patent

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Profile ID: LFUS-PAI-P-637282

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