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Billboard advertising copy hoist system
Billboard advertising copy hoist system
Filed: January 12th, 2006 [Granted]
Patent Number: 7367462
Illllllllllllllllllllllllllllllllllllllllllllllllll US007367462B1 (12) United States Patent McMurray et al. (io) Patent No.: (45) Date of Patent: US 7367462 ...