I was just glancing at this Gillette Mach 3 “M3 Power” box of razor refills. It contains the following text on the back, and overflowing on the bottom tab:

U.S. Patent Nos./ N^os de brevets américains:

4,586,255; 4,624,051; 4,720,918; 4,807,401; 4,916,817; 5,063,667; 5,113,585; 5,191,712; 5,295,305; 5,303,539; 5,399,204; 5,701,788; 5,761,814; 5,794,354; 5,800,627; 5,813,293; 5,906,834; 5,918,369; 5,956,848; 5,956,851; 5,998,431; 6,009,624; 6,029,354; 6,035,537; 6,041,926; 6,044,542; 6,046,764; 6,052,903; 6,185,822; 6,192,586; 6,212,777; 6,216,349; 6,295,734; 6,442,839; 6,502,318; 6,594,904; D397,290; D398,522; D398,523; D401,014; D422,380; D424,745; D447,283

No less than 43 patents about a shaver and shaving blade. Absolutely amazing. (It took a long time to type all those!)