Portfolio comparison
PPG Industries vs Ampex Corp
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
PPG Industries
Patents indexed
1
Year range
1981
Most recent
1981
chemicalenergymanufacturingmaterialsindustrial_process
Top Patents1 enriched
US 4253922· 1981
How a Special Carbon-Fluorine Catalyst Makes Chlorine and Caustic Soda
Activity by Decade
1980s1
Company B
Ampex Corp
Patents indexed
1
Year range
1960
Most recent
1960
consumer_electronicsmechanicaltelecommunications
Top Patents1 enriched
US 2956114· 1960
How Ampex Invented Modern Video Recording on Magnetic Tape
Activity by Decade
1960s1
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