The following persons, partnerships, firms, or corporations shall be exempt from the permit provisions of this chapter:
(a) Ordinary commercial travelers who sell or exhibit for sale goods or services to local firms or businesses and not to residences;
(b) Daily deliveries of milk and bakery and other food products, liquor deliveries, or newspaper deliveries;
(c) Insurance salesmen, real estate salesmen, and other professionals licensed by the state, except that insurance salesmen shall personally solicit only at the specific request of the owner or occupant of the business or residence at which the solicitation is being made.