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
Aisle barrier
Packaging sleeve
Spectrometer
Sterilizable film for aseptic packaging
Compact light shield for flash photography
Methods and apparatus for low power out-of-band communications
Food safety printer
  Randomly Featured Patents
Cultivator tine
Pruning device
Valve device, liquid supply apparatus, and liquid ejection apparatus
Slide gate nozzle including sequentially replaceable refractory sliding plates and refractory plate assembly employable therein
Polycrystalline ferromagnetic metal oxide and method of manufacturing the same
Speaker retainer
Mobile communication system having improved visitor location register content management and method of operation
Thin film magnetic head slider
Inkjet printing apparatus and actuator controller and actuator controlling method used in inkjet printing apparatus
High rate coding for media noise