This is a list of current open hardware licenses. This table is ported from this Open Hardware Licenses report.
| TAPR OHL (v.1.0) | CERN OHL (v.1.2) | CERN OHL-S (v.2.0) | CERN OHL-W (v.2.0) | CERN OHL-P (v.2.0) | TDPL (v. 1.2) | Solderpad (v. 2.0) | |
|---|---|---|---|---|---|---|---|
| Allows proprietary derivatives | No | No | No | No | Yes | No | Yes |
| Allows unmodified redistribution | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Allows combination with proprietary designs | No? | No? | No | Yes | Yes | No? | Yes |
| Allows redistribution under a different licence | No | No | No | No | Yes | No | Yes |
| Allows changing the text of the licence | No | No | No | No | No | No | Yes |
| Requires notifying changes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Requires providing the location for the documentation | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Requires providing a copy of the licence | Yes | Yes | Recommended | Recommended | Recommended, required if redistributing under a different licence | Yes | Yes |
| Requires contacting upstream licensor when distributing modified documentation | Best effort attempt | No | No | No | No | No | No |
| Requires contacting the upstream licensor when producing and distributing products | Best effort attempt | Optional | No | No | No | No | No |
| Requires including the old files with the new, modified files in the documentation | Yes | No | No | No | No | No | No |
| Requires copyright notice to be kept in documentation files | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Requires Notices to be accessible to those who receive products | Yes | Yes | Yes | Yes | Yes | Yes | No? |
| Grants non-exclusive patent licence | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Extends patent litigation immunity to owners of OH-based products | Yes | No | No | No | No | Yes | No |
| Includes patent retaliation clause in event of litigation | No | No | Yes | Yes | Yes | No | Yes |
| Includes grace period for bringing the infringing party into compliance | No | No | Yes | Yes | N/A | No | No |
| Grants trademark licence | No | No | No | No | No | No | No |
| Provides no warranty or guarantee of fitness for any use or purpose | Yes, but with one exception | Yes | Yes | Yes | Yes | Yes | Yes |
