Registering a Design can be advantageous to protect your sales & marketing of your product, no matter what sort of industry or service you are in.
Inventia Life Sciences P/L has a design registration (#2018 17323) for a cartridge used by customers loading sample/raw materials into their bio-printing 3D printers.
Huskee is a brand name with designs for sustainable takeaway coffee cups covered by both Trademarks and design registrations.
Paras Paresh Mehta secured a design registration for a beautiful decagonal design for cut/polished diamonds.
There are plenty of interesting examples of Australian designs successfully protected – check out IPAustralia’s “Designs” section and look for the “Case Studies”.