US Patent 4,072 (1845)
US patent 4,072, "Improvement in Machines for Casting Types." Issued 1845-06-07 to David Bruce, Jr., Williamsburg, NY.
Here are the low-resolution official copies of the plates:
Just as I have photostats from microfilm of No. 3,324, so also I have the same of 4,072. Here (with the same caveats and explanations as before) are the high-res image files and the medium-res plate presentations:
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