What's the patent number of Fukuda?
CREATE TABLE table_name_21 (plant_patent_number VARCHAR)
SELECT plant_patent_number FROM table_name_21 WHERE "inventor" = "fukuda"
### Context: CREATE TABLE table_name_21 (plant_patent_number VARCHAR) ### Question: What's the patent number of Fukuda? ### Answer: SELECT plant_patent_number FROM table_name_21 WHERE "inventor" = "fukuda"