South African Registered Design vs Patent
A registered design protects the appearance of an article, unlike a patent which protects the invention on which an article is based. Even though the underlying principle of operation may be the same, a new appearance may be protectable by way of a registered design.

Registered Design
Patent
Protects the appearance of an article. Protects the invention on which an article is based.
Duration
Aesthetic designs are protected for 15 years.
Functional designs are protected for 10 years.
Duration
Patents are protected for 20 years
(provided that it is renewed annually.)
Renewals
Renewed annually after the third year of registration.
Renewals
Renewed annually after the third year of registration.