Portfolio comparison
Pilkington Brothers Ltd vs DUAL PARKING METER Co
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Pilkington Brothers Ltd
Patents indexed
1
Year range
1959
Most recent
1959
mechanicalmaterialsautomotiveconsumer_electronics
Top Patents1 enriched
US 2911759· 1959
How the Float Glass Process Makes Perfectly Flat Window Panes
Activity by Decade
1950s1
Top Patents1 enriched
US 2118318· 1938
How the First Coin-Operated Parking Meter Works
Activity by Decade
1930s1
How to use
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