A company called Commonwealth Research Group LLC (Commonwealth)Â filed a patent infringement suit last month against a number of technology companies, accusing them of infringing a patent relating to an energy saving system for electronic devices.
The ‘493 Patent is directed to electronic circuitry that conserves energy by turning off or reducing power to selected chip components.Â A disclosedÂ embodiment involving powering a tape recorder isÂ shown below.Â The embodimentÂ comprisesÂ a circuit having two relays (12, 18).
In its normal position, the second relay (18) supplies continuous power to the power bus.Â The first relay (12) is designed to lock open as long as power is maintained on the power bus.Â Â Â
Tape sensor prongs (27) momentarily connect on a passing cassette tape (26) to energize the second relay (18).Â When the second relay (18) is energized, the power bus loses power, and the first relay (12) returns to the normal position with no power supplied to the tape recorder (14).
It is unclear from the complaint who or what Commonwealth is.Â The complaint does not say anything about the company except that it is a Virginia corporation that owns all rights to the ‘493 Patent.Â
The only other information I could find on the internet was throughÂ a search of the U.S. Patent and Trademark Office assignments database, whichÂ lists a Washington, DC address for Commonwealth.Â
Commonwealth has requested a preliminary and permanent injunction,Â which would requireÂ the companyÂ to explain how it’s been harmed by the alleged infringement.Â More details are likely to come out at that time.