With 2,367 patents published between 2002 and 2022, Halliburton Co holds the most number of patents in the Oil & Gas sector in Norway, of which 88.9% was contributed by its subsidiary Halliburton Energy Services Inc.
The second largest number of patents were published by Baker Hughes Co with 1,674 related patents, of which 69.5% was contributed by its subsidiary Baker Hughes Srl. The third largest number of patents were published by Schlumberger Ltd with 1,454 related patents, of which 75.4% was contributed by its subsidiary Schlumberger Technology BV. The fourth largest number of patents were published by Pfizer Inc with 615 related patents, of which 32.8% was contributed by its subsidiary Pfizer Products Inc.. The fifth largest number of patents were published by AstraZeneca Plc with 541 related patents, of which 91.3% was contributed by its subsidiary AstraZeneca AB.
The top five patent holders, i.e., Halliburton Co, Baker Hughes Co, Schlumberger Ltd, Pfizer Inc, and AstraZeneca Plc, together held 6,651 patents during the period.
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