Can I patent my invention which is just an enhancement to an already patented device?
<p>Can I claim patent for my invention which is a little upgraded version of already patented devices. Moreover, I use same patented devices in my invention and add new functionalities to it. Is it worth patenting?</p>

<p>Not if it is "just" an advancement.</p>

<p>Improvements to processes, machines, manufactures, or compositions of matter, are patentable but only <em>if</em> they are new and useful, and non-obvious (among other requirements like adequate disclosure etc.)</p>

<p>35 USC 101-103, 112</p>

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