Inventor
Harry D. Shearer
Inventor
St. Petersburg, FL, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Rprimary
G01RMeasuring electric variables20%
G01SRadio direction-finding20%
G07CTime or attendance registers20%
H03DDemodulation or transference of modulation from one carrier to another20%
H04LTransmission of digital information, e.g. telegraphic communication20%
PatentTitleYear
4,286,223'Wideband digital frequency discriminator and phase and frequency detector'19814,236,110'Digital frequency deviation meter'19804,180,724'Solid state digital running time indicator'19794,054,880'Position fixing system utilizing plural commercial broadcast transmissions and having frequency correction'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1981Patents assigned to E SYSTEMS INC (4)· patent assignee history
1977–1981Based in St. Petersburg, FL, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| E SYSTEMS INC | 4 | 1977–1981 |
Locations
| Location | Patents | Span |
|---|---|---|
| St. Petersburg, Florida, US | 4 | 1977–1981 |