共 14 条
[1]
CAMPBELL JA, 1943, Patent No. 2333151
[2]
DUNLOP AP, 1952, Patent No. 2584681
[3]
HARVEY MT, 1945, Patent No. 2383793
[4]
HEBERER AJ, 1937, Patent No. 2095250
[5]
HERSH HI, 1947, Patent No. 2432890
[6]
KIEFER EF, 1939, Patent No. 2174887
[7]
KORTEN E, 1943, Patent No. 2321493
[8]
MEILER JG, 1941, Patent No. 2243481
[9]
Nordlander BW, 1946, US Pat., Patent No. [2,399,055, 2399055]
[10]
REINECK EA, 1945, Patent No. 2367312