共 77 条
[31]
HOFFMANN K, Patent No. 554134
[32]
HOFFMANN K, 1947, Patent No. 359707
[33]
HOFFMANN K, Patent No. 184877
[34]
HOFFMANN K, 1961, CA 26001, V55
[35]
HOFFMANN K, Patent No. 869089
[36]
HOFFMANN K, Patent No. 1022228
[37]
HOFFMANN K, 1954, Patent No. 345342
[38]
HOFFMANN K, Patent No. 1161339
[39]
HOFFMANN K, Patent No. 51493
[40]
HOFFMANN K, Patent No. 1161338