While I was doing some research, I came across a search result for an 1889 patent by Leon Sirieix for a ship compass.
I dug around a little further and I see that Google has indexed and made available patents and patent applications from the US Patent Office, the European Patent Office and the World Intellectual Property Organization. This is what the Advanced Search page looks like, so lots of options for searching a patent:
There are over 8 million patents in the database, with the US dating back to 1790, and the others back to 1978.
The images are actual pages of the patents, including renewals and modifications.
Google has packaged all the Patent and the Trademark files into Zipped files and offers them for free bulk download. I opened a Trademark zip file to see what's what. Inside just ONE file were 932 trademark pages, each one bearing the name and image of the trademark, the register number and date, and the signatures of the owners and witnesses. The trademarks range from simple words to elaborate drawings. Here are examples:
The Boston Rubber Shoe Company The Coventry Company