[LINK] Questions re patents

[Bernard Robertson-Dunn]

In the past I've tried to avoid patents, but I think I need to get some 
idea how they work.

If a patent claim has three methods, objects, features, or advantages 
(I'll call them features)

Which of these is a potential infringement?:

1) A system that includes all three features and no more features

2) A system that includes all three features plus several more, 
different, features

3) A system that includes two of the features and no more features

4) A system that includes two of the features and several more, 
different, features

Or, to generalise, if I want to achieve the same end but in a different 
manner, what do I have to do to avoid infringing the patent?

Or have I completely misunderstood the way patents work?

-- 

Regards
brd

Bernard Robertson-Dunn
Sydney Australia
email: brd at iimetro.com.au
web:   www.drbrd.com
web:   www.problemsfirst.com
Blog:  www.problemsfirst.com/blog