The Variant and Subvariant structure is unique to hobbyDB and helps organize the database. Learn more by reading
What is a Variant
and
What is a Subvariant
in our help section.
Marklin Jan. 1942 Uncoupling Patent
The Variant and Subvariant structure is unique to hobbyDB and helps organize the database. Learn more by reading
What is a Variant
and
What is a Subvariant
in our help section.
Many of these patents are located up in the research archives of the Marklin factory in Goppingen. This original patent was submitted by engineer Otto Bang-Kaup.