A small, geographically bound family business like this is one thing, but we should pay more attention to what kind of creatures we're creating in the long run.
An LLC is a very useful legal fiction, but more and more we're seeing the effects of allowing virtually unbounded, private for profit organizations.
Nintendo was founded in 1889.
As just one counter-example; I'm sure there are plenty more/earlier: Siemens was founded in 1847 (edit: by building telegraph equipment and infrastructure).
Edit: I'm sure there must have been earlier companies involved in "tech" that are still relevant? Maybe let's think about "tech" as "information technology" companies?
Kiewit formed in 1884.
On the other hand, Western Union is still trading under its original name.