4. Supports
  5. Counterbalance weights

Arthur J. Holbrook

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Aquarium heater

Supports – Counterbalance weights
Patent

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Aquarium heater

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent

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Aquarium waterfall

Animal husbandry – Entomological culture device – Egg treatment – production – or storage
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Thermostatically controlled externally mounted electric aquarium

Electric heating – Heating devices – Combined with container – enclosure – or support for material...
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