US Patent 6,007,549
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
A posterior burr hole Vocalizer device comprises a head band for attachment to a patient's head, a band constriction unit for adjusting the diameter of the head band, a sagittal plane aligning piece, and a trajectory plane aligning piece. The device is properly positioned on a patient's head in relation to the supraorbital rims and the superior attachment point of the patient's external ears in order to define an optimum location for a posterior burr hole site. Methods of making such a burr hole localizer device are also disclosed, together with methods for locating an anterior target site and an optimum posterior burr hole site.
Howard III, Matthew A. Posterior burr hole localizer. US Patent 6,007,549 filed June 13, 1997 and issued December 28, 1999. https://ir.uiowa.edu/patents/233