How do I suppress author and location in a patent bibliography?

Question

I'm trying to suppress the rendering of location and authors in a bibliography of patents, but an unable to find documentation on how to accomplish this.

The example below, is my attempt, based on the logic of related questions here, but is having no effect.

How do I suppress author and location in a patent bibliography?

\documentclass{article}

\usepackage[]{biblatex-chicago}

\AtEveryBibitem{%
\ifentrytype{patent}{
    \clearfield{author}%
    \clearfield{location}%
}{}
}

\usepackage{filecontents}

\begin{filecontents}{test-lit.bib}
@patent{lens.org/072-791-597-282-659,
    number = {US 8574659 B2},
    type = {Granted Patent},
    title = {Healthcare Information Management Evidence},
    author = {Author A, Author B},
    date = {2019-09-03},
    location = {United States},
    url = {https://lens.org/072-111-222-333-444}
}

@patent{lens.org/179-367-355-357-993,
    number = {US 0195811 B2},
    type = {Granted Patent},
    title = {Food Supply  Automation Grocery Method},
    author = {Author A, Author B, Author C},
    date = {2019-08-27},
    location = {United States},
    url = {https://lens.org/777-111-888-333-000}
}

@patent{lens.org/117-614-886-875-323,
    number = {US 114252345 B2},
    type = {Granted Patent},
    title = {Methods And Systems For Methods And Systems},
    author = {Author A, Author B, Author C},
    date = {2019-08-27},
    location = {United States},
    url = {https://lens.org/444-111-555-333-666}
}
\end{filecontents}

\addbibresource{test-lit.bib}

\nocite{*}

\listfiles

\begin{document}

\printbibliography