Inventor

HARDZINSKI MARY LOUIS

US3 patents

⚠️ This page may combine multiple inventors who share the name “HARDZINSKI MARY LOUIS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

AMERITECH CORP

2 patents

US6539079B1Mar 25, 2003

Method and system for providing enhanced call waiting

AMERITECH CORP9 citations71

US7095826B2Aug 22, 2006

Method and system for providing enhanced call waiting

AMERITECH CORP4 citations60

AT & T IP I LP

1 patent

US7903805B2Mar 8, 2011

Method and system for providing enhanced call waiting

AT & T IP I LP0 citations49