4. G - Physics
  5. 02
  6. B

Knox Manufacturing Co.

G - Physics – 02 – B

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Abrading device

B - Operations – Transporting – 24 – C
Patent

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Frame assembly for supporting illuminated transparency viewers

G - Physics – 02 – B
Patent

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Movie screen stretching device

G - Physics – 03 – B
Patent

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Overlay device for use with an illuminated transparency viewer

G - Physics – 02 – B
Patent

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Portable movie screen

G - Physics – 03 – B
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