Sequence of Triplets of Primitive Pythagorean Triangles with Same Area/Historical Note

Historical Note on Sequence of Triplets of Primitive Pythagorean Triangles with Same Area
The first of these sets of $3$, with area $13 \, 123 \, 110$, was reported by as having been discovered by  in $1945$.

The following $3$ sets of $3$ were discovered by in $1986$.

The $5$th sets of $3$ was discovered by and  in $1990$.

The $6$th sets of $3$ was discovered by using an exhaustive computer search over areas, and reported in The Math Forum on the $2$nd of March, $2017$. The search took roughly $35$ GHz-days.