The Qi product pipeline

Each Qi wireless charging product is tested by an independent test lab before it can be launched. The test lab issues a 'compliance certificate' when the product is found to be compatible with the Qi specification.

The certificate is issued before a product is announced. That means you can see the pipeline of Qi product announcements by looking at the number of issued certificates.

'Rx' means 'receiver'. These are phones, battery packs and other products that receive power.

'Tx' means 'wireless charging station'.