4. Geometrical instruments
  5. Distance measuring
  6. By flexible tape

William C. Blackman

Inventor

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Combined key chain and measuring tape

Travel goods and personal belongings – Umbrella or parasol – walking support – Cane or walking support
Patent

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Hooking device for a measuring tape

Geometrical instruments – Distance measuring – By flexible tape
Patent

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Power return tape

Geometrical instruments – Area integrators – Electrical
Patent

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Retainer for power-return tape measure spring

Winding – tensioning – or guiding – Reeling device – With spring motor
Reexamination Certificate

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Retractable tape measure with sliding lock

Geometrical instruments – Distance measuring – By flexible tape
Patent

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Profile ID: LFUS-PAI-P-169907

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