BLACK KNIGHT INVESTMENTS LIMITED, A CORP. OF BRITISH WEST INDIES

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4413979 Preform for molding custom dental impression traysExpiredApr 19, 79Nov 08, 83[A61C]
4361528 Method of making thermoplastic dental impression trayExpiredAug 30, 79Nov 30, 82[B29C, A61C]
4234307 Occlusal plane orientation guideExpiredFeb 08, 79Nov 18, 80[A61C]
4227276 Toothbrush with thermally deformable handleExpiredFeb 07, 79Oct 14, 80[A46B]
4227877 Anatomical intra-orally moldable dental impression tray and methodExpiredOct 20, 77Oct 14, 80[A61C]

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