http://uspto.gov/ or the United States Patent and trademark office has an open database in case you want to search details and images of patent and trademark.
The fields in which you can search are :
- Title
- Abstract
- Publication Date
- Document Number
- Application Date
- Application Serial Number
- Assignee Name
- Assignee City
- Assignee State
- Assignee Country
- Current US Classification
- International Classification
- Inventor Name
- Inventor City
- Inventor State
- Inventor Country
- Government Interest
- PCT Information
- Foreign Priority
- Related US App. Data
- Claim(s)
- Publication Document Kind Code(s)
- Publication Filing Type(s)
- Description/Specification
