Inventor
Richard J. Piereth
Inventor
Naperville, IL, US
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Mprimary
H04MTelephonic communication56%
H04QSelecting44%
PatentTitleYear
5,185,781'Automation of telephone operator assistance calls'19935,181,237'Automation of telephone operator assistance calls'19935,163,083'Automation of telephone operator assistance calls'19924,899,375'More efficient call handling for operator assistance calls'19904,677,609'Semi-automated directory assistance systems'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–1990Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (2)· patent assignee history
1987–1993Based in Naperville, IL, US· patent location history
1992–1993Patents assigned to AT & T BELL LAB (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| AT & T BELL LAB | 3 | 1992–1993 |
| AMERICAN TELEPHONE & TELEGRAPH | 2 | 1987–1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| Naperville, Illinois, US | 5 | 1987–1993 |