Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
PL

Pendelfin Studios Limited — 23 Patents

Rank (All Time): #26,023 of 105,732Top 25%
3 inventors
23 Patents All Time

Patents per Year

Patents granted per year, 1980 to 1990Bar chart with a peak of 4 patents in 1983.peak 41980: 2 patents19801983: 4 patents19831984: 4 patents19841985: 2 patents19851986: 3 patents19861988: 2 patents19881989: 4 patents19891990: 2 patents1990

Top Inventors at Pendelfin Studios Limited All Time

Showing 1–3 of 3 inventors

RankNamePatents
1 Doreen N. Roberts 11
1 Jean W. Heap 11
3 Derek H. Roberts 1