参考文献:
Barta, Thomas E. Becker, Daniel P. Bedell, Louis J. Boehm, Terri L. Brown, David L. Carroll, Jeffery N. Chen, Yiyuan Fobian, Yvette M. Freskos, John N. Gasiecki, Alan F. Grapperhaus, Margaret L. Heintz, Robert M. Hockerman, Susan L. Kassab, Darren J. Khanna, Ish K. Kolodziej, Stephen A. Massa, Mark A. McDonald, Joseph J. Mischke, Brent V. Mischke, Deborah A. Mullins, Patrick B. Nagy, Mark A. Norton, Monica B. Rico, Joseph G. Schmidt, Michelle A. Stehle, Nathan W. Talley, John J. Vernier, William F. Villamil, Clara I. Wang, Lijuan J. Wynn, Thomas A. Patent: US005/9838 A, 005 Location in patent: Page 3 US 0050009838 A