You don't need a factory-ready model, but a professional prototype—even one made with 3D printing or DIY materials—proves the concept works.

Before showing it to anyone, file a Provisional Patent Application (PPA) . This gives you "patent pending" status for 12 months at a relatively low cost. Use Non-Disclosure Agreements (NDAs) for any detailed discussions. 2. Finding Potential Buyers Companies That Will Buy Your Invention Ideas

Research existing products in your specific "micro-category" to see where yours fits. Gather feedback from unbiased sources beyond friends and family to confirm demand.