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Koala

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Join Date: Aug 2011

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Searching for Patent

09-18-2017, 11:39 AM

I didn't know Google has a built in inventor search.

Don't know how to directly access it but

US8063777B2 - Real-time rectangular-wave transmitting metal detector platform with user selectable transmission and reception properties - Google Patents

http://www.google.co.uk/patents/US8063777

A highly flexible real-time metal detector platform which has a detection capability for different targets and applications, where the operator is able to alter synchronous demodulation multiplication functions to select different types or mixtures of different types to be applied to different synchronous demodulators, and also different waveforms of the said synchronous demodulation multiplication functions; examples of the different types being time-domain, square-wave, sine-wave or receive signal weighted synchronous demodulation multiplication functions. The operator can alter the fundamental frequency of the repeating switched rectangular-wave voltage sequence, and an operator may alter the waveform of the repeating switched rectangular-wave voltage sequence and corresponding synchronous demodulation multiplication functions.

If you click on"Bruce Halcro Candy" link

Then click on the tools you can search by filing date or publish date

Adding time to the end of box that says ininventor:"Bruce Halcro Candy"

Came back with

US9547065B2 - Method for detecting fast time constant targets using a metal detector - Google Patents

https://www.google.co.uk/patents/US9547065?dq=ininventor:%22Bruce+Halcro+Candy%22+time&hl=en&sa=X&ved=0ahUKEwiGl_nO0q7WAhWlJMAKHQAWAWMQ6AEIKDAA

A method for reducing a delay, between a transition of a transmission of a metal detector and a process of a receive signal received by a receive coil of the metal detector, due to a critically damped time constant of the receive coil, including: introducing a negative capacitance into the receive coil to reduce the critically damped time constant.
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