CEDA-Labz designs and manufacture power electronics, RF and precompliance products. Primary focussing in RF Power meters and RF Linear Amplifiers

GNU - Code is released under the GNU General Public License. ALL DERIVITES of that code must be published freely. 

Products using any portion of GNU protected code must be distributed freely to be in compliance.
GNU code CAN be used for commercial products, but you must provide the code. 
You are not allowed to call it yours or proprietary. CEDA -Labz uses code without any changes as it is being published. The credentials of the code remains intact which you may find at the start of the device. Further, on any derivative designs CEDA dont wish to earn any profit its just an extended Assembly integration product.
CEDA-Labz also uses derivative work on it products. The PCB Design is completely redone and many changes has been done whenever we use a derivative work.
The FSF argues that free software should not place restrictions on commercial use.  Further, ANY DERIVATIVE work cant be his property since the base code originated from the 1st developer. The 1st developer is confusing as whom I know the first developer might have used a small reference code or desgin eventually the 1st claimer is null and void. 
Free software means that the users have the freedom to run, edit, contribute to, and share the software. Thus, free software is a matter of liberty, not price. 
What is GNU?
GNU is an operating system that is free software—that is, it respects users' freedom. The GNU operating system consists of GNU packages (programs specifically released by the GNU Project) as well as free software released by third parties. The development of GNU made it possible to use a computer without software that would trample your freedom.
Use of licensed software
Software under the GPL may be run for all purposes, including commercial purposes and even as a tool for creating proprietary software, such as when using GPL-licensed compilers
Further, any Derivative work is a multilayer process and no one can claim its his work completely. Who is the 1st creator of that work is impossible to state as the 2nd last creator may have used a portion of his work from some where else.

For further reference - https://upload.wikimedia.org/wikipedia/commons/4/41/GPLstatements_consumerentertainmentdevices.jpg


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