Yippee, I found 192 expired and near-expired patents from before 1997 under the corporate name - Mechanical Technology Incorporated, using AN/"Mechanical Technology Incorporated". Some are from the mid-70s, but I haven't look at them all in detail. Less than 10 of these patents are less than 20 years old.
The company is in Latham NY.
Zero Patent applications under this company name.
All the patents that I select have no value to investors since the patent protection has expired.
How exciting is that? They can present these patent documents on the Antiques Roadshow.