H.L. Wohlfarth stands for Hiram Lenard Wohlfarth. He is my grandfather. My Dad's name is Hirm Lenard Wohlfarth Jr. who is also from Maryland. H.L. Wohlfarth used to make badges in his home in Brentwood. Please e-mail me if you would like more information.
I would very much like to have a picture of the sword you found and if you are interested I can send you a picture of H.L. Wohlfarth.