Salesforce won't allow you to rollup information from assets to account without coding.
When Assets are used in Salesforce, you could have a checkbox or other target fields populated on the account record to indicate what asset has has been deployed to an account.
- Rollup the information on the Asset object to the Account page via Text rollup. You could then reference this information in a formula field elsewhere in the system such as on the campaign member object via the contact -> account relationship.
- You can then create a campaign member based report or view this info on the campaign member record page to help sales reps who are following up on events/seminars to see what assets a customer has.