Inventor
Reinhard W. Rosch
Inventor
Richmond, CA
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Mprimary
H04MTelephonic communication75%
H02HEmergency protective circuit arrangements8%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems8%
H04QSelecting8%
PatentTitleYear
5,661,794'Telephone line interface circuit with voltage control'19975,511,118'Method of providing d.c. feed to a telephone line'19965,390,231'Protection and recovery of telephone line interface circuits'19955,323,461'Telephone line interface circuit with voltage switching'19945,274,702'Wideband telephone line interface circuit'19935,258,713'Impedance generator for a telephone line interface circuit'19934,947,427'Protection arrangement for a telephone subscriber line interface circuit'19904,764,956'Active impedance line feed circuit'19884,446,338'Telephone lines status sensor'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1997Patents assigned to NORTHERN TELECOM LTD (9)· patent assignee history
1984–1997Based in Richmond, CA· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NORTHERN TELECOM LTD | 9 | 1984–1997 |
Locations
| Location | Patents | Span |
|---|---|---|
| Richmond, CA | 9 | 1984–1997 |