共 6 条
[1]
CRESPI RS, 1983, PATENTING BIOL SCI
[3]
LANDIS JL, 1974, MECHANICS PATENT CLA
[4]
QUIGG DJ, 1985, J PATENT TRADEMARK O, V68, P351
[5]
1983, GENERAL INFORMATION
[6]
1987, OFFICIAL GAZETTE US, V1078, P9