ridgeblue99, let me know which ones, I'll gladly add them. The key point - they should be linked to the existing ones via purchase of assets of via merge.
I think I misunderstood the premise behind your chart, Eugene. It's a fine looking chart, but there are no references to any of the Leica/Leitz companies. I do know that Leidolf was bought by Leitz, though it then ceased to be a camera manufacturer, and started making surveying equipment, going through three more corporate reorganizations and name changes after that to end up in Leitz Holdings.
Oh, it's not a list of all camera companies in the world by any means Only a tree of linked manufacturers.
Leitz! Yes! That's a company with one-off pattern of almost no mergers, acquisitions, bankruptcies, etc. Very unusual for German camera/lens manufacturers with 100 years old history, I don't know how they kept at it for all these years. It is unfortunate I couldn't include it because I can't link it to anywhere. Just a standalone box wouldn't fit a "tree" model (even though I have three trees in there, not one, all of them have a lot of interconnections).
The note about Leidolf is interesting, thanks! I always thought it just went bankrupt, but seems like there is a factory building connection via Wild Heerbrugg, too bad it's not a camera manufacturer. Only recently in 2013 Leica purchased Sinar, so yeah, there is a tree sprout started growing, not a tree yet I am constantly on a lookout for more information, that's why I ended up here, curious about "missing players" :-)
You know, there is a link after all! 51% shares of Sinar were acquired by Jenoptik (Carl Zeiss Jena) in 2005. And if Sinar ended up in Leica business in 2013, there is a connection for sure. I'll research it a little more and if everything comes out right, I'll add Leica as well! Thanks for pointing me to a new direction! :-)
DHW Fototechnik is no longer existent - they fell into bankrupca and were refounded under the name of DW Photo (https://www.dw-photo.eu/). There are the same people working there, the main difference is, that the name "Hartje", the former president, is no longer part of the company name (the H in DHW meant Hartje)
Some CONTAXes, FX2, FX-3 Super2000, FX-103, DentalEye III, D (6x6), ATORON, SAMURAI, some Half-frames, "more gear than neccessary" (just my wife's 2cents)