She was introduced to drawing by her father, Joseph Hallock, who edited the "Answers to Queries" column in the Philadelphia Bulletin.
When he gave her pencils and paper, it was a "life-changing moment," said her daughter, Jenny Lynn, herself a noted artist and photographer.
"The first time I saw marks being made on paper by my father, I thought it was a miracle," she told her daughter.
"She began drawing and painting in earnest from that time on," Jenny said.
Jenny said her mother's illustrations were distinguished by "her exceptional draftsmanship and classic painting style."
Her mother was only 18 and living in Hammonton, N.J., when she won first prize in a high-school art competition among students in New York, New Jersey and Connecticut.
The winning painting was called "Swing Along Together," and it depicted children of various nationalities in a happy playground setting.
Patricia was quoted in a New York Herald Tribune story about the contest as saying she chose children as her subject "since most of them are still untouched by prejudice, and accept all others as their equals and their friends."
This sentiment remained a guiding force in Patricia's life throughout her career.
Her career began with children's illustrations for such clients as the old Curtis Publishing Co., including its Jack and Jill magazine, J.B. Lippincott and Westminster Press.
She went on to create product designs for such companies as Lenox, QVC, Campbell's Soup and Franklin Mint. She also made art for Audubon, the United Nations and the World Wildlife Fund.
Along with her own artwork, she encouraged young people by teaching at Philadelphia area art centers.
Patricia studied at the Pennsylvania Academy of the Fine Arts, where she met her future husband, Russell R. Lynn, also studying art.
She and her husband also studied at the Barnes Foundation with Dr. Albert Barnes and Violette de Mazia when the school and gallery were in Merion.
As a mother, Patricia often did her artwork in the evenings after putting her children to bed.
Last fall, she and her daughter presented a joint exhibition of their work at the Stapeley center. Most of Patricia's illustrations had not been exhibited or published before, Jenny said.
"Those pictures were made when she was a young mother to show art directors in hopes of getting freelance work doing children's illustrations, which she did succeed in doing," her daughter said.
Patricia and her husband lived in Tampa, Fla., for a time early in their marriage. They later lived in Warrington, Bucks County, Abington and Radnor before moving to East Falls.
After her husband, an artist and engineer, died in 2012, she moved to Stapeley.
Besides her daughter, she is survived by another daughter, Louise Sweet-Cardellino; a son, Chris Lynn; six siblings; and six grandchildren. She was predeceased by another daughter, Kathy Lynn-Bolno.
Services: A memorial service will be scheduled later.
Donations in her name may be made to the Pennsylvania Academy of the Fine Arts, 118 N. Broad St., Philadelphia, PA 19102.