There is no cheap or easy way to get information of value.  You have to
work hard for something to be appreciated.  If you care to put in some
effort and some eyestrain you can go to the New York Public Library at
42nd Street and Fifth Ave in the New York City.  You will then get all the
information you need.  They have the patents on microfilm.  First you have
to look in the index (by year), and under "Sandel" check for his patent
numbers.  Then go to the microfilm for that patent.  

You can make photocopies of the patents on the microfilm reader which you
are using to view your information.  You should have comfortable reading
glasses, pencils, magnifying glass and a notebook.  Call in advance so you
can be sure the section of the library you want is open.

Enjoy,  Walter Kehoe