Google used OCR (Optical character recognition) software to copy all the patents, once you have worked with it for a while you will find many, many mistakes in the spelling.
Even with all the problems Google is light years ahead of the patent office for online searches, you can do the normal type of Google searches at their patent search page and find what you need much faster.
http://www.google.com/patents Experiment, try things like Tonks fire-arms or tonks firearms after you get a feel for the place it goes fast. sometimes a single word will bring you something you never knew was there like "Wundhammer".
