Dating an Item by the Patent Number

There is a great resource out there for all of us who collect antiques or other collectible items. It is a page put out by the government that dates when an item was patented. click on the Title to go to the page. It usually has the plans that were drawn out and submitted too, although you need Adobe to view them. It has been a great help to me and I thought I would share that with all of you too!
Other pages that help with this too are: http://www.bottlebooks.com/patentdater.htm
and: http://www.mwtca.org/mwpat.htm
Check it out!