US Plant Patent PP16294
Hokuto Shiro Ichigoukin
Bunashimeji mushroom plant named ‘Hokuto Shiro Ichigoukin’
PUBLIC DOMAIN
Patent expired August 24, 2023. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on July 23, 2023. This patent earned 32 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP16294
- Filed
- July 23, 2003
- Granted
- February 28, 2006
- Expires
- August 24, 2023
- Assignee
- HOKUTO SANGYO KABUSHIKI KAISHA
- Inventor
- ISHII MAKOTO; IMAI HISAE; YAMAZAKI MIZUE
Abstract
The present variety of mushroom plant named ‘Hokuto Shiro Ichigoukin’ was produced by crossbreeding mutant fungal strains of two parent varieties, a + variety ‘Hokuto Hachigoukin’ and a − variety ‘Hokuto Jyunigoukin,’ after UV irradiation. This edible mushroom is not bitter, and can be cultivated anywhere a cultivation facility can be arranged.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct variety of Bunashimeji mushroom plant as illustrated or described.
Read the full patent: US Plant Patent PP16294 in full — the complete specification, every figure, and the file history.