From 1982 to 2004, he had his own design firm.
In the early 1920s, he started his own design firm.
Both companies used the same design firm in developing their products.
She owned and ran the design firm, with a small staff.
Even the way some of the design firms describe themselves has changed.
Several design firms were involved in various aspects of the project.
He recently worked with a couple who created an architectural design firm after they were married.
For example, in a major project several design firms are normally involved.
The building has been renovated into office space for use by design firms.
This decision ends the eight month competition between various design firms around the world.