the last 5 years I have purchased computer components from a company in
South Korea (the manufacture). The manufactures has a piece of
application software that runs the components. A software company in
India has made changes to this application software in the past with
the SDK and source code obtained from the manufacture in South Korea.
The software company has made improvements to the manufactures original
software.
I am not a lawyer.
There is a company in Canada that has also made changes to the
manufactures software. Can the Canadian company copyright software
that they have only changed?
They can copyright their changes. This means you have to deal with
BOTH copyrights before you can use it. This sort of thing is common:
a performer and a songwriter and a choreographer may all have
copyrights on parts of the same music video.
Can I take the software from the Canadian company and give it to the
Indian software company?
Unless you have rights to distribute, NO.
Can the Indian software company continue to
make changes to the Canadian's software without breaking any
Intellectual Property or Copyright laws?
If the Indian software company buys a legal copy of the software
from the Canadian company with rights to make modifications (something
which end-user licenses don't usually give), yes, they can make
modifications. BUT: they cannot distribute such a copy to you
unless they also bought re-distribution rights.
Gordon L. Burditt