Ray Steven Spratt

City:

Country:

United States

Published Applications:

Last publication date:

2020-02-13

Top Assignees for applications by Ray Steven Spratt

The entities that hold a legal rights for patent applications filed by inventor Spratt Ray Steven:

Ray Steven Spratt from , US has applied for patents for these inventions. The list has both pending applications and granted patents:

Adjustable progressive lens and design method

Prescription determination

InventorID:

2643920 ⎘