参考文献:
Carson, John R. Dax, Scott L. DeCorte, Bart Liu, Li McDonnell, Mark McNally, James J. Patent: US6/13554 A1, 6 Location in patent: Page/Page column 3 US 613554 A1
参考文献:
Carson, John R. Dax, Scott L. DeCorte, Bart Liu, Li McDonnell, Mark McNally, James J. Patent: US6/1355 A1, 6 Location in patent: Page/Page column 19 US 61355 A1