Inventor
Richard L. Stuart
Inventor
Columbia, MD, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Lprimary
H04LTransmission of digital information, e.g. telegraphic communication63%
H03HImpedance networks, e.g. resonant circuits13%
H04BTransmission13%
H04HBroadcast communication13%
PatentTitleYear
4,660,193'Digital modulation method for standard broadcast FM subcarrier'19874,646,305'High speed data modem using multilevel encoding'19874,489,416'Equalization system for modems in a polled arrangement'19844,380,062'Communication system providing simultaneous two-way transmission'19834,355,397'Full duplex communication system for voice grade channels'19824,123,710'Partial response QAM modem'19783,983,485'Multi-phase and multi-amplitude level modulator and modulation and demodulation methods'19763,946,214'Multi-level digital filter'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1984Patents assigned to RIXON (6)· patent assignee history
1976–1978Based in Simpsonville, MD, US· patent location history
1982–1987Based in Columbia, MD, US· patent location history
1987Patents assigned to CASE COMMUNICATIONS INC (1)· patent assignee history
1987Patents assigned to REGENCY ELECTRONICS (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RIXON | 6 | 1976–1984 |
| CASE COMMUNICATIONS INC | 1 | 1987 |
| REGENCY ELECTRONICS | 1 | 1987 |
Locations
| Location | Patents | Span |
|---|---|---|
| Columbia, Maryland, US | 5 | 1982–1987 |
| Simpsonville, Maryland, US | 3 | 1976–1978 |