# Polygraph

> duplicating device using pen and ink

**Wikidata**: [Q1686381](https://www.wikidata.org/wiki/Q1686381)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Polygraph_(duplicating_device))  
**Source**: https://4ort.xyz/entity/polygraph-q1686381


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)