Inventor
HOBACK CONAWAY K
US6 patents
Patents
6 patentsUS4916733AApr 10, 1990
Pay station telephone call answer supervision apparatus
DIGITAL TELECOMMUNICATIONS SYS25 citations91
US4777647AOct 11, 1988
Pay station telephone interface
DIGITAL TELECOMMUNICATIONS SYS48 citations91
US4924497AMay 8, 1990
Pay station telephone interface circuits
DIGITAL TELECOMMUNICATIONS SYS21 citations80
US4942604AJul 17, 1990
Line power control circuit for pay station telephone
DIGITAL TELECOMMUNICATIONS SYS16 citations72
US4926468AMay 15, 1990
Pay station telephone coin box apparatus
DIGITAL TELECOMMUNICATIONS SYS7 citations72
US4926469AMay 15, 1990
Pay station telephone call routing apparatus
DIGITAL TELECOMMUNICATIONS SYS6 citations61