Inventor
Dennis C. Jeffreys
Inventor
Bedford, MA, US
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Bprimary
H04BTransmission30%
H04JMultiplex communication20%
G07DHandling of coins or valuable papers, e.g. testing, sorting by denominations, counting, dispensing, changing or depositing10%
H02JElectric power networks10%
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 systems10%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution10%
Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids10%
PatentTitleYear
4,400,688'Method and apparatus for communication over electric power lines'19834,218,655'Method and apparatus for transmitting intelligence over a carrier wave'19804,106,007'Method and apparatus for transmitting intelligence over a carrier wave'19784,105,897'Cycloconverter apparatus and method for working into an active load'19783,952,851'Coin selection method and apparatus'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976Patents assigned to MARS INC (1)· patent assignee history
1976–1983Based in Bedford, MA, US· patent location history
1978–1983Patents assigned to NEW ENGLAND POWER SERVICE COMP (3)· patent assignee history
1980Patents assigned to NEW ENGLAND POWER SERVICE (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NEW ENGLAND POWER SERVICE COMP | 3 | 1978–1983 |
| MARS INC | 1 | 1976 |
| NEW ENGLAND POWER SERVICE | 1 | 1980 |
Locations
| Location | Patents | Span |
|---|---|---|
| Bedford, Massachusetts, US | 5 | 1976–1983 |