4. Cutlery
  5. Cutting tools
  6. Saw

Michael K. Costen

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Hand-held cutting tool with fatigue-resistant blade

Cutlery – Cutting tools – Saw
Patent

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Heat exchanger with header tubes

Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages
Reexamination Certificate

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Lightweight, low-cost solar energy collector

Stoves and furnaces – Solar heat collector – With concentrating reflector
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1507534

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