Tree step

Details Tree step Tree step

1985-10-28

1988-08-09

Word, A. Hugo

Building units and construction elements

Stair, ladder, scaffold, or similar support

Element or attachment

Patent

active

D02971690

REFERENCES:
patent: D42598 (1912-06-01), White
patent: D242548 (1976-11-01), Zane
patent: 1588566 (1926-06-01), Wismer

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