| 
 | The ornamental design for a dual nonconvertible buccal tube, as shown and described. | |||||||||||||||||
FIG. 1 is a perspective view of the dual nonconvertible buccal tube design of this invention depicting the front, top and right side thereof;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a bottom plan view thereof.
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| Jun 14 1993 | HILGERS, JAMES JAY | Ormco Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 006625/ | 0477 | |
| Jul 14 1993 | Ormco Corporation | (assignment on the face of the patent) | / | |||
| Dec 11 2000 | Ormco Corporation | ABN AMRO BANK N V | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 011400/ | 0232 | |
| Jun 06 2002 | ABN MARO BANK N V | Ormco Corporation | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 012946/ | 0993 | |
| Jun 06 2002 | Ormco Corporation | CREDIT SUISSE FIRST BOSTON | SECURITY AGREEMENT | 012958/ | 0243 | 
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