Is patent US 4,734,658 A avalible free of change in commercial products?


In reference to the patent: US 4,734,658 A

We are from India, we wish to use this patent in one of our products. Can we use this patent free of charge or we have to pay some amount?


Posted 2015-09-27T18:15:50.710

Reputation: 21

Question was closed 2015-09-28T02:19:55.777

Patent already expired if no overlapping patents are on said product public is open to use it. – Pushpak – 2015-09-28T11:18:19.460

No answers