Complex sentence: Part of the reason for his obscurity was that Subbarao did not "market his work" as per a patent attorney, who was astonished to find that he had not taken any of the steps that scientists everywhere consider routine for linking their name to their handiwork.
Split into simpler sentences: Part of the reason for his obscurity was that Subbarao did not "market his work". A patent attorney was once astonished to find that he had not taken any of the steps that scientists everywhere consider routine for linking their name to their handiwork.