US Plant Patent PP18561
Garnet Tower
Acer palmatum plant named ‘Garnet Tower’
UNDER PATENT
Still under patent. Protection ends September 16, 2026.
Twenty years from the filing date would end on September 12, 2026. This patent earned 4 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP18561
- Filed
- September 12, 2006
- Granted
- March 4, 2008
- Expires
- September 16, 2026
- Assignee
- ITSAUL PLANTS LLC
- Inventor
- SHIBAMICHI AKIRA
Abstract
A new cultivar of Acer palmatum var. dissectum, ‘Garnet Tower’, characterized by its unique upright plant habit, it's deeply dissected and purple colored foliage, its purple stems, and its ability to be readily graphed on Acer palmatum rootstock.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct cultivar of Acer palmatum var. dissectum plant named ‘Garnet Tower’ as herein illustrated and described.
Read the full patent: US Plant Patent PP18561 in full — the complete specification, every figure, and the file history.