On 26 Apr 2007 07:14:33 -0700, andre firstname.lastname@example.org wrote:
Probably. I spent a little time last night looking at patents issued
last week at freepatentsonline. Just from my memory I can recall
prior art directly affecting about a third of 'em. I bet I could nuke
over half 'em with prior art with a few hours' searching.
I have a rather old 6 volume set of books called something to the
effect "encyclopedia of mechanical gadgets". It's a compilation of
interesting gadgets and mechanisms, much of the drawings from the
patent database. I hit those books first when I think I've invented
something new. I usually haven't. Too bad the patent office can't be
bothered to look in their own database.
Yup, and the reverse of that, the Sachs engine that had two pistons on
a wishbone con rod. Very little mechanical is new under the sun,
especially involving IC engines.
John De Armond
See my website for my current email address
Look carefully at the claims. If someone patents an engine describing
a brass bolt in the claims, you may be able to get a newer patent claiming
a steel bolt instead of the brass bolt, because the previous patent only
claimed the brass bolt, but it may turn out that nobody (including you)
will be able to build the engine with the brass or the steel bolt,
without the previous patentholder's permission. If someone else wants to
build the steel bolt version, they will also need your permission.
In this situation, your new patent may be virtually worthless,
even though it is perfectly valid.
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