Andral Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4574918 Ladder locking mechanismExpiredApr 16, 84Mar 11, 86[E06C]
4519476 Detachable workbench topExpiredMay 29, 84May 28, 85[E06C, E04G]
4493392 Convertible fold-up ladderExpiredSep 29, 83Jan 15, 85[E06C]
4457391 Fold-up ladderExpiredJan 21, 82Jul 03, 84[E06C]
4448283 Portable fold-up ladderExpiredMay 06, 83May 15, 84[E06C]
4429766 Ladder consisting of sliding sectionsExpiredSep 13, 82Feb 07, 84[E06C]

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