# Damm algorithm

> check digit algorithm presented by H. Michael Damm

**Wikidata**: [Q5212665](https://www.wikidata.org/wiki/Q5212665)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Damm_algorithm)  
**Source**: https://4ort.xyz/entity/damm-algorithm


## References

1. [Source](https://www.cantab-ip.com/blog/2014/01/20/new-format-for-singapore-ip-application-numbers-at-ipos/)
2. [Source](https://www.ipos.gov.sg/docs/default-source/resources-library/patents/guidelines-and-useful-information/patents-formalities-manual.pdf#page=36)