Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Harbey Hubbell, Incorporated Patents
Assignee:
Harbey Hubbell, Incorporated
Address:
Bridgeport, CT
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
4091431 Ground leakage relay circuit May 23, 1978
A ground leakage relay circuit including a core balance transformer through which pass the supply and return line of the circuit to be protected and having a multi-turn secondary winding. A capacitor is connected to be normally charged from a d.c. source. A normally conducting transistor

 
 
  Recently Added Patents
Cooking device and method of manufacture of the same
Device for preparing a body fluid for a bacteriological analysis
Pyrrolidine derivatives, pharmaceutical compositions containing the same, and methods of using the same
Multi-carrier operation for wireless systems
Electronic device with embedded antenna
Apparatus and method for providing vehicle data for testing product
Method and system for updating device management application meter read logic
  Randomly Featured Patents
Preservative for fodder, mixed fodder and silage
Apparatus for Czochralski single crystal growing
Ceiling fan
Vibration compensator which corrects for vibration errors based on servocontrol unit errors
Docking apparatus
Overdraft protection and forgiveness
Doll with simulated physiological functions
Arrangement for cooling electronic modular units in equipment and network cabinets
Coating compositions for providing water and blister resistance to ink-receptive paper
Dc power plug with LED's improved connecting method