This report analyzes patents protecting mycelium-based materials that could replace plastic and petroleum products in construction, packaging, and insulation. Researchers found 73 existing patents and 34 applications, mostly owned by three US companies, with concerns that overly broad patent protections may be slowing innovation in this promising sustainable materials field. The findings suggest that while mycelium materials show tremendous potential as eco-friendly alternatives, patent restrictions need better management to accelerate their development and commercialization.