
| Characteristic | Microsoft | Amazon | Apple | ||
|---|---|---|---|---|---|
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
| - | - | - | - | - | - |
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Source
Release date
November 2017
Region
Worldwide
Survey time period
2009 to November 10, 2017
Supplementary notes
* Incomplete records as patents from these years are still being published
Citation formats









