Dr. G, the brand is Mylan. The product is called Nitroglycerin Transdermal System, dosage rate 0.2 mg/hr. I'll try to upload a picture tomorrow when I get access to a better camera.
Edit: Actual size is 8 cm^2, recommended application is cutting into quarters for a lower dosage. I also experimented with using an eighth's portion depending on how the tendon is feeling and how long I've been patching it.