You need to install TIFF Image Viewers and Plug-Ins.
This is what you do:
1. Go to: http://www.uspto.gov/faq/plugins/tiff.jsp
2. Then make your selection.
If you are using Internet Explorer or Netscape, then select this:http://www.internetiff.com
If you are using Apple, then go to: http://www.apple.com/quicktime/
For those using Linux, then go to: http://fredrik.hubbe.net/plugger.html
3. If you want a free version then click "TRY before BUY".
4. After installing, you need to restart your computer.
Now you should be able to view the images from the patent site.