ROBISHAW, JOHN H.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4928616 Construction transporation systemExpiredMar 14, 89May 29, 90[B60P]
4890959 Transportation and construction methodExpiredFeb 06, 86Jan 02, 90[E02B]
4811681 Construction transportation systemExpiredJul 07, 87Mar 14, 89[B60P]
4695184 Locks for construction componentsExpiredAug 17, 84Sep 22, 87[F16B]
4687379 Method and apparatus for constructing elevated structuresExpiredFeb 09, 86Aug 18, 87[E02B]
4647257 Method and apparatus for constructing elevated structuresExpiredFeb 22, 85Mar 03, 87[E02D]
4610215 Construction components with improved locking systemExpiredAug 17, 84Sep 09, 86[B63B]

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