4. Communications: electrical
  5. Systems
  6. Portable self-contained

William D. Petty

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Film supply and take-up system for motion picture projector

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

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Film supply and take-up system for motion picture projector

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

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Method of and apparatus for enhancing discharge state manipulati

Communications: electrical – Systems – Portable self-contained
Patent

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Profile ID: LFUS-PAI-P-417477

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