# Integra Signum

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**Integra Signum** was a [publicly traded](/source/Aktiengesellschaft) [Swiss](/source/Switzerland) company active in [train control](/source/Train_protection_system) and signaling systems. Its main achievement was the development of the train control system [Integra-Signum](/source/Integra-Signum), which was subsequently adopted by the [Swiss Federal Railways](/source/Swiss_Federal_Railways) in 1933. In addition, many Swiss railway stations were (and continue to be) equipped with the company's signal boxes from the Domino 55, Domino 67, or Domino 69 series. Headquartered in [Wallisellen](/source/Wallisellen), the company existed from the late 19th century until January 1, 1992, when it was acquired by [Siemens](/source/Siemens). Siemens renamed the company to Siemens Integra Verkehrstechnik. It is now a division of [Siemens Mobility](/source/Siemens_Mobility).

## References

- [History of Siemens (Schweiz) AG (in German)](http://w1.siemens.ch/ch/de/cc/siemens/historie/unternehmen/Pages/das_unternehmen.aspx)
- [History of the company's location in Wallisellen (in German)](http://www.integra-square.ch/html/index.php?id=29) [Archived](https://web.archive.org/web/20080501060941/http://www.integra-square.ch/html/index.php?id=29) 2008-05-01 at the Wayback Machine

## Further reading

- [Railway signaling company in India started by Integra Signum](http://www.ihc.co.in)
- [Examples of Domino 69 signal boxes developed by Integra Signum](http://www.ivt.ethz.ch/oev/eisenbahn) [Archived](https://web.archive.org/web/20080429044718/http://www.ivt.ethz.ch/oev/eisenbahn) 2008-04-29 at the Wayback Machine

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