Why do some blue sky boko barbecues have patent numbers and some don't?

Imitate. Tianjin Blue Sky Boko Barbecue Grill is authentic. There will be an anti-counterfeiting QR code, baked steel seal and patent number on the right side of the genuine product, but there is no imitation. Beijing Blue Sky Boko Technology Co., Ltd. is a professional company that researches and produces smokeless barbecue ovens. Based on strong scientific research strength and professional technology, the company integrates research and development, production, sales and service.