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That meeting sparked a friendship that led to a collaboration that put Bliss and Mischief's American Southwest-inspired chainstitch embroidery on a limited range of NSF shirts, jackets and jeans.

From this I saw that I could not make a stitch similar to handwork, but must have some other mode of fastening the thread on the underside, and among other possible methods of doing this, the chainstitch occurred to me as a likely means of accomplishing the end.

This was the first American patent for a chainstitch machine.

At this time Grover became a partner with another Boston tailor, William E. Baker, and on February 11, 1851, they were issued U.S. patent No. 7,931 for a machine that did exactly what Grover had set out to do; it made a double chainstitch with two threads both carried on ordinary thread spools.

As the process was repeated, a chainstitch was formed with the enchained loop on the under side.