关于先锋PH4CV, 我找到两个资料，有兴趣的不妨看看# WaterWorld - 未名水世界
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下面两个资料，上面的来之美国官方的解释，下面来自方舟子自己网站上一个人的翻译
部分！读者自己理解！
http://www.uspto.gov/web/patents/classification/uspc800/defs800.htm
298 Higher plant, seedling, plant seed, or plant part (i.e.,
angiosperms or gymnosperms):
This subclass is indented under subclass 295. Subject matter wherein
the plant, seedling, plant seed,
or plant part is a higher plant, i.e., an angiosperm or gymnosperm, both of
which produce seeds.
299 Haploid:
This subclass is indented under subclass 298. Su
部分！读者自己理解！
http://www.uspto.gov/web/patents/classification/uspc800/defs800.htm
298 Higher plant, seedling, plant seed, or plant part (i.e.,
angiosperms or gymnosperms):
This subclass is indented under subclass 295. Subject matter wherein
the plant, seedling, plant seed,
or plant part is a higher plant, i.e., an angiosperm or gymnosperm, both of
which produce seeds.
299 Haploid:
This subclass is indented under subclass 298. Su
