In reference to the patent: US4010057
I am doing a research project on hydrographic printing and am looking for some information on the history. Two separate patents published on different dates by the same inventor are claiming to have invented the same technology of hydrographic printing.
the other patent number is:
US 4436571 A
which can be accessed here:
https://www.google.com/patents/US4436571
Just trying to figure out who did what and when.
Thank-you,
Iain