Quarterly report pursuant to Section 13 or 15(d)

Note 4 ??? Inventories (Tables)

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Note 4 – Inventories (Tables)
9 Months Ended
Jan. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   

January

2022

 

April

2021

Raw materials   $ 1,370,380     $     
Work-in-process     39,153           
Finished goods     930,147       362,072  
Total   $ 2,339,680     $ 362,072