Actually Jan, the second part of the story is that a bit later he hired the engineer who wrote the book. The engineer told him that the books circuits were not very good and he showed how to build much better amplifiers.
However the book's intent was to introduce semiconductors to folks who previously only had experience with tubes. So the book followed the style of the RCA vacumn tube handbooks.
As to the issue at hand a good research effort will most likely show the circuit under consideration can be found earlier and elsewhere. Thus it is prior art in the public domain. So as long as it is not sold as "Maplin" or any other name it should be fine.
Nige can "build, use, sell" the circuit under discussion all day long, without any requirement for attribution, no license, no legal restriction deriving from its origin/originators - because it is firmly in the "Prior Art" category
if his tattooist redraws the diagram freehand he can have it prominently displayed on any part of his anatomy public or private
there are restrictions on using the magazine, author or kit supplier's names, Copyrighted article, drawings, manuals exact/"mechanical" copies
if his tattooist redraws the diagram freehand he can have it prominently displayed on any part of his anatomy public or private
there are restrictions on using the magazine, author or kit supplier's names, Copyrighted article, drawings, manuals exact/"mechanical" copies
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Posts #7, #33 & #40 seem to fit the description seeing as they stand apart as actually being correct and thus useful.....
As noted by SY......
"Patent is the only method of protecting a circuit"
As has been stated again and again, misappropriation of trademark is a large potential issue. Using a circuit that is not covered by patent is no issue. This seems to be difficult for some to grasp.
Let me say this calmly:
Do not use another company's trademark to sell your equipment.
Thank you.
Let me say this calmly:
Do not use another company's trademark to sell your equipment.
Thank you.
If no income is solicited or earned by using someone else's mark, this use is not normally infringement. Trademark rights protect consumers from purchasing inferior goods because of false labeling. If no goods or services are being offered, or the goods would not be confused with those of the mark owner, or if the term is being used in a literary sense, but not to label or otherwise identify the origin of other goods or services, then the term is not being used commercially.
My italics. See:- Cover Pages: Use of Registered Trademarks, Trademarks, and Service Marks
My italics. See:- Cover Pages: Use of Registered Trademarks, Trademarks, and Service Marks
https://www.google.com/#q=monster+cable+trademark+bully is the extreme bad example but some of the articles point out their (limitied) legitimate legal justification
Subtle but appropriate there SY 
Hahaha! Claiming no one is helping the OP and then offering advice that could only land the OP in legal difficulties! Absolutely staggering
No disrespect to any of the posters who know what they're talking about, but this is a classic example of advice being given by those without requisite knowledge & training. If you want legal advice speak to a specialist legal firm. After all you wouldn't go to a legal firm to check your PCB layout now would you?
Hahaha! Claiming no one is helping the OP and then offering advice that could only land the OP in legal difficulties! Absolutely staggering
No disrespect to any of the posters who know what they're talking about, but this is a classic example of advice being given by those without requisite knowledge & training. If you want legal advice speak to a specialist legal firm. After all you wouldn't go to a legal firm to check your PCB layout now would you?
I can understand that to a point, but there's no need to go overboard with it. How much effort should be put into this historical aspect?
It hasn't been mentioned, but acknowledgement could be stated vaguely but accurately, i.e. "...based upon manufacturer's app notes and a UK hobbyist magazine project."
Huh? What do you mean by this?
Source pro speaker line array double 12inch vt4888 on m.alibaba.com (You might have to close an ad to get to the item.)
(Copy of EV Logo on a JBL design using JBL part #!)
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