4. Metal working
  5. Means to assemble or disassemble
  6. Spring applier or remover

John F. Hartman

Inventor

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Garage door spring stretcher

Metal working – Means to assemble or disassemble – Spring applier or remover
Patent

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Locking assembly for an astragal

Closure fasteners – Bolts – Sliding
Reexamination Certificate

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Mechanism for rotating a robot arm on an axis

Material or article handling – Vertically swinging load support – Shovel or fork type
Patent

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Robot gripping jaw operator

Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent

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Rotary mechanism for robot arms

Material or article handling – Horizontally swinging load support – Swinging about pivot
Patent

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Profile ID: LFUS-PAI-P-1133036

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