Watanabe Orthopedic Systems, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4747394 Spinal retractorExpiredOct 08, 86May 31, 88[A61B]
4712781 Operating table for microscopic lumbar laminectomy surgeryExpiredMay 12, 86Dec 15, 87[A61G]
4590923 Arthroscope-video camera assemblyExpiredApr 18, 83May 27, 86[A61B]

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