4. Communications: electrical
  5. Condition responsive indicating system
  6. Specific condition

Ronald C. Klassen

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Digital battery capacity warning device

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Grease applicator for a drill shaft

Boring or penetrating the earth – Processes
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Long lived dual battery with automatic latching switch

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent

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Profile ID: LFUS-PAI-P-550940

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