Tag Archives: divided

Door-knocking indicator with circle divided by red, yellow and green sectors (containing special area)

Application Number: 00110920Application Date: 2000.03.01Publication Number: 1264099Publication Date: 2000.08.23Priority Information: International: G08B7/00Applicant(s) Name: Li GuangqianAddress: Inventor(s) Name: Li GuangqianPatent Agency Code: 00000Patent Agent: Abstract A door-knocking indicator is composed of a pointer and a circle which is divided into red, yellow, green and two special sectors, which respectively express emergency, visit, gossip, special emergency and… Read More »