Solution to the previous challenge
US57175A
Alfred Nobel, "Explosive compound", patented 14 August 1866 (found using Espacenet).
How to apply for a patent
Pay fees and claim refunds
Unitary Patent
Coronavirus (COVID-19)
Listen to our podcast
Calendar of events
Digital technologies in the lead
We use cookies on our website to support technical features that enhance your user experience.
We also use analytics. Access full information on cookies that we use and how to manage them
