Microsoft Patent 060606
It is true that Microsoft has a patent application with the numbers 060606 in it,
for a system which rewards physical activity with cryptocurrency.
If does not directly refer to injectable microchips, but that technology is connected to related patents.
Beware of word tricks such as changing noun phrases to make them deniable:
EG: Change "nanotech vaccine" to "injectable microchips" and then the word "microchip" can be denied, whereas
the injected nanotech has the same function.