Angle

The plaintiffs, Anna Hopkins Angle and the S. S. White Dental Manufacturing Company, a corporation, filed their bill of complaint in the District Court as owner and licensee respectively of Letters Patent No. 1,584,501, 1 granted to Edward H. Angle May 16, 1926, charging infringement by the defendant Sidney Richardson.

The trial court found for the plaintiffs and ordered an accounting and no appeal has been taken. Prior to the trial in the matter just mentioned, the defendant, having first secured leave, filed a bill of cross-complaint against the mentioned plaintiffs claiming that they had infringed patent No. 1,976,141, granted Oct. 9, 1934 to himself and Charles Edward Boyd. The grant to Boyd was as the assignee of a one-half interest in the patent. The trial court found in favor of cross-complainants and against cross-defendants on claim 2 of such patent and none other and ordered an accounting. The cross-defendants appeal from the judgment entered therein.

Both patents above mentioned relate to a metal tie-bracket but a small fraction of an inch in width, length and thickness. In use it is affixed to a band of metal which is placed around a tooth. A wire or arch-bar…