4. Fire escape, ladder, or scaffold
  5. Means maintaining platform level on angularly movable support
  6. Swingable support

David Waters

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Heater autotone control apparatus and method

Industrial electric heating furnaces – Resistance furnace device – Control
Patent

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Network communications coupler

Electrical computers and digital processing systems: multicomput – Multiple network interconnecting
Reexamination Certificate

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Pruning system

Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent

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Pruning system

Fire escape – ladder – or scaffold – With extensible vertical and nonvertical sections
Reexamination Certificate

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Profile ID: LFUS-PAI-P-482063

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