4. Railway switches and signals
  5. Switches
  6. Snow protected

David H. Gerwing

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Device and system for management of battery back up power...

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate

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Device for managing battery packs by selectively monitoring...

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – Having variable number of cells or batteries in series
Reexamination Certificate

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Railway switch heating apparatus

Railway switches and signals – Switches – Snow protected
Patent

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Profile ID: LFUS-PAI-P-361325

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