Below you can find logos, similar to the 3com 31.

CoPathPlus 312 CoPathPlus 312 vector
Carvel 318 Carvel 318 vector
Fairchild's Executive Technology 31 Fairchild's Executive Technology 31 vector
Edward Jones 131 Edward Jones 131 vector
Pittsburgh Penguins 131 Pittsburgh Penguins 131 vector
NDP 31 NDP 31 vector
3Com 33 3Com 33 vector
TCBY Treats 131 TCBY Treats 131 vector
Blumer 313 Blumer 313 vector
Altima 331 Altima 331 vector
3COM BW 3COM BW vector
3COM 3COM vector
Mincom 231 Mincom 231 vector
DBM 131 DBM 131 vector
Euronics 131 Euronics 131 vector