Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1991-01-30
1994-02-15
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
Patent
active
D03443477
REFERENCES:
patent: D257395 (1980-10-01), Correll
patent: D280440 (1985-09-01), Gromer, Jr.
patent: D300861 (1989-04-01), Correll et al.
patent: D308728 (1990-06-01), Carlson
patent: 3696887 (1972-10-01), Brzykcy
patent: 4596308 (1986-06-01), Auerbach
patent: 4711319 (1987-12-01), Sansotta et al.
patent: 4756384 (1988-07-01), Maddox
Clark Doris
Empak Inc.
Word A. Hugo
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