Corporate heraldry is like a special picture that companies use to show who they are. It's kind of like a family crest, but for businesses.
Cornish corporate heraldry is when companies in Cornwall, which is a place in England, use special pictures to show that they're from there. These pictures might have things like pictures of fish, waves, or even a tin mine, which is something Cornwall is famous for.
These pictures are usually made by someone who is really good at drawing and knows a lot about the history of the area. Sometimes companies will even use symbols that are related to their industry, like a picture of a drill for a mining company or a picture of a boat for a fishing company.
These pictures are important because they help the company stand out and show their identity. It's also a way for them to connect with other companies and people from the same area. So if you see a picture of a fish or a tin mine on a company's logo, you know they're from Cornwall!