Problem with search fields

[ArtemMIPT]

I tried to search on USPTO web site for patents of Amazon and the result was ~9000 patents. Using this library I found only ~600 patents.

I was searching for patents using expression:
expression = 'firstNamedApplicant:(Amazon)'

What other fields can be used? (I tried some other fields, but result of search didn't change).

[amotl]

Dear Artem,

thanks for writing in. I'm also aware about some issues with this API, but i will have to investigate it more thoroughly before i can tell you about more details. I will try to catch some time during the next days, but i can't promise it to happen before christmas. Apologies in advance and thanks for your patience.

With kind regards,
Andreas.