@article{029485451,
title = "Trephine and method us patent 4763651. august 16 1988",
author = "Kaufman, H.E. and Mcdonald, M.B.",
year = "1988",
journal = "Official Gazette of the United States Patent and Trademark Office Patents",
volume = "1093",
number = "3",
pages = "1085",
issn = "0098-1133",
url = "https://eurekamag.com/research/029/485/029485451.php"
}