# Inventor Underground

> Practical English-language guides for independent inventors: ideas, ownership, prototypes, production and reaching customers.

The contemporary library is separate from the restored historical collection. Examples are illustrative unless attributed. Read each guide’s primary sources and editorial policy before making legal, safety or financial decisions. This guide is not a license or an access-control policy.

## Start here

- [Blog and guides](https://inventorunderground.com/blog/): Browse the contemporary library.
- [Inventor FAQ](https://inventorunderground.com/page19/page19.html): Historical questions and practical guide links.
- [Editorial approach](https://inventorunderground.com/blog/editorial-policy/): Sources, AI assistance and corrections.

## Topics

- [Validate the problem](https://inventorunderground.com/blog/topics/problem-validation/): 5 published guides.
- [Understand customers](https://inventorunderground.com/blog/topics/customer-research/): 5 published guides.
- [Search existing inventions](https://inventorunderground.com/blog/topics/prior-art/): 5 published guides.
- [Plan patent protection](https://inventorunderground.com/blog/topics/patent-strategy/): 5 published guides.
- [Share ideas carefully](https://inventorunderground.com/blog/topics/confidentiality/): 5 published guides.
- [Clarify ownership](https://inventorunderground.com/blog/topics/ownership/): 5 published guides.
- [Plan a prototype](https://inventorunderground.com/blog/topics/prototype-planning/): 5 published guides.
- [Turn sketches into CAD](https://inventorunderground.com/blog/topics/cad-design/): 5 published guides.
- [Choose materials](https://inventorunderground.com/blog/topics/materials/): 5 published guides.
- [Test what matters](https://inventorunderground.com/blog/topics/prototype-testing/): 5 published guides.
- [Prepare for production](https://inventorunderground.com/blog/topics/manufacturing/): 5 published guides.
- [Work with suppliers](https://inventorunderground.com/blog/topics/supplier-quality/): 6 published guides.
- [Understand costs and pricing](https://inventorunderground.com/blog/topics/cost-pricing/): 5 published guides.
- [Fund the next step](https://inventorunderground.com/blog/topics/funding/): 5 published guides.
- [Explore licensing](https://inventorunderground.com/blog/topics/licensing/): 5 published guides.
- [Explain your invention](https://inventorunderground.com/blog/topics/pitching/): 5 published guides.
- [Prepare your launch](https://inventorunderground.com/blog/topics/product-launch/): 5 published guides.
- [Reach the right buyers](https://inventorunderground.com/blog/topics/product-marketing/): 5 published guides.
- [Plan product safety](https://inventorunderground.com/blog/topics/safety-compliance/): 5 published guides.
- [Keep the project moving](https://inventorunderground.com/blog/topics/inventor-resilience/): 5 published guides.

## Optional

- [Sitemap](https://inventorunderground.com/sitemap.xml): Published page addresses.
- [Guide index](https://inventorunderground.com/assets/guide-index.json): Titles, descriptions, topics and canonical URLs generated from the published guide data.